A Philippine legal article

I. Why this topic matters

Cases under Republic Act No. 10591, the Comprehensive Firearms and Ammunition Regulation Act, are public offenses prosecuted in the name of the People of the Philippines. That starting point seems simple, but in practice it raises a recurring litigation question:

Can a private prosecutor participate in a criminal case for violation of RA 10591? If yes, to what extent?

The answer is yes, but only within tightly defined limits. In Philippine criminal procedure, the public prosecutor remains in full control of the criminal action. A private prosecutor may appear only by authority of the public prosecutor or the court, and generally only to prosecute the civil action arising from the crime, subject to the rules on when that civil action is deemed instituted, reserved, waived, or separately filed.

That general framework becomes especially important in firearms cases because many RA 10591 prosecutions do not involve a natural private complainant in the usual sense. Illegal possession of firearms, possession of ammunition, dealing or trafficking without authority, carrying outside residence without proper authority, tampering with serial numbers, and similar offenses are often treated as offenses against public order and regulatory control, not as crimes primarily centered on compensating an injured private party. That affects whether there is a meaningful civil action to be pursued by a private prosecutor at all.

This article examines the subject comprehensively in the Philippine setting: the statutory and procedural framework, the scope of private prosecutor participation, the special character of RA 10591 offenses, procedural problems that arise in court, and the practical consequences for judges, prosecutors, defense counsel, and complainants.

II. Core rule: criminal prosecution belongs to the State

The most important principle is this:

Under the Constitution and the Rules of Court, the prosecution of criminal actions is vested in public prosecutors. The offended party does not own the criminal case. The real party in interest in the criminal aspect is the People of the Philippines.

The offended party may have an interest in the civil liability ex delicto and, in some situations, may participate through a private prosecutor, but that participation does not displace the prosecutorial control of the State.

This is a settled Philippine rule reflected in:

Rule 110 of the Rules of Court on prosecution of offenses
the established doctrine that a criminal action is prosecuted under the direction and control of the prosecutor
the line of cases affirming that a private prosecutor acts only as an assistant and cannot take over the criminal case from the public prosecutor

That principle applies fully to RA 10591 cases.

III. The legal basis for private prosecutor participation

1. Rule 110, Section 5

The main procedural anchor is Rule 110, Section 5 of the Rules of Criminal Procedure, which provides that all criminal actions commenced by complaint or information shall be prosecuted under the direction and control of the prosecutor. It also allows the offended party, any peace officer, or public officer charged with enforcement of the law violated to prosecute the case in particular situations, especially where the prosecutor is absent or where the law or rules permit.

As a practical matter, in regular trial courts, the familiar setup is:

the public prosecutor prosecutes the criminal action;
a private prosecutor may appear to assist;
that appearance must be under the direction and control of the public prosecutor.

2. Rule 111 on the civil action

The other critical rule is Rule 111, because the private prosecutor’s usual justification for appearing is the prosecution of the civil liability arising from the offense.

The basic doctrine is:

When a criminal action is instituted, the civil action for recovery of civil liability arising from the offense charged is generally deemed instituted with it, unless the offended party:
- waives the civil action,
- reserves the right to institute it separately, or
- has already instituted it before the criminal action.

Where the civil action is deemed instituted, a private prosecutor may appear to protect that civil interest. But this presupposes that there is an offended party with a legally cognizable civil claim arising from the crime charged.

3. Administrative and ethical practice

In actual practice, courts usually require:

a written or oral authority/appearance for the private prosecutor,
the conformity or at least non-objection of the public prosecutor,
recognition by the court that the private prosecutor appears only as assisting counsel or for the civil aspect.

Without that foundation, the private prosecutor’s participation may be challenged.

IV. Who is a private prosecutor in Philippine criminal procedure?

A private prosecutor is a private lawyer engaged by the offended party to intervene in the criminal case, not to represent the People independently, but to protect the private complainant’s civil interests and to assist the public prosecutor.

This role has several features:

Derivative role The private prosecutor does not exercise original prosecutorial authority.
Subordinate role The private prosecutor acts only under the direction and control of the public prosecutor.
Civil-action orientation The private prosecutor’s traditional justification is the prosecution of the civil liability ex delicto, not the criminal action as such.
No independent control of theory or disposition A private prosecutor cannot, on his own:
- withdraw the case,
- amend the information,
- oppose dismissal in lieu of the public prosecutor,
- insist on a theory rejected by the State prosecutor,
- appeal the criminal aspect in his own name.

This framework is crucial in firearms cases because those cases often produce confusion about whether there is any private civil interest at all.

V. What kinds of cases under RA 10591 are we talking about?

RA 10591 regulates firearms, ammunition, accessories, manufacture, dealing, transfer, registration, possession, carriage, and related prohibited acts. While its sections are detailed, for present purposes the most relevant point is that many prosecutions under the law concern acts such as:

illegal possession of firearms;
unlawful acquisition or possession of ammunition;
possession of parts or accessories regulated by law;
dealing in firearms or ammunition without license;
illegal transfer, sale, delivery, or transport;
carrying firearms outside residence or place of business without proper authority;
tampering, obliteration, or alteration of serial numbers and identifying marks;
use of loose firearms in connection with other crimes;
possession of classified firearms or explosives without legal authority, where applicable.

These are typically malum prohibitum/regulatory offenses designed to enforce State control over firearms. In many of them, there is no direct individual victim suffering patrimonial or personal injury from the specific offense charged.

That has immediate consequences for private prosecutor participation.

VI. The key distinction: firearms offenses with a private offended party vs. firearms offenses without one

This is the analytical center of the topic.

A. Pure regulatory/public-order firearms offenses

Examples:

possession of an unlicensed firearm;
possession of ammunition without lawful authority;
carrying a firearm outside residence without proper permit or authority;
obliteration of serial number;
unlawful manufacture or dealing where the case is framed as a violation of the regulatory statute.

In these cases, the direct injury is primarily to the State’s regulatory regime and public order. The complainant is often:

the arresting police officer,
the seizing agency,
the PNP-Firearms and Explosives Office,
or the State itself through the prosecutor.

Here, there is often no private offended party with a civil action ex delicto to recover. If so, the ordinary rationale for a private prosecutor is missing.

B. Firearms cases tied to injury or damage to a private person

Different considerations arise where the facts involve a firearms violation together with injury to a private person. Examples:

a shooting resulting in homicide, murder, frustrated homicide, attempted homicide, physical injuries, or damage to property;
a robbery or other crime committed with the use of an unlicensed firearm;
a separate RA 10591 charge plus a Revised Penal Code offense with a definite victim.

In that setup, there may indeed be an offended party for the companion offense and therefore a civil action for damages. But even then, care is needed:

the private prosecutor’s participation may relate more clearly to the principal offense against person or property rather than to the standalone regulatory firearms count;
where there are multiple informations, the basis for participation may differ from case to case.

This is where sloppy practice often leads to objections.

VII. General rule for RA 10591 cases: private prosecutor participation is limited and often unnecessary

For standalone RA 10591 firearms offenses that do not involve a distinct private victim, the more defensible legal position is:

1. The public prosecutor should handle the case alone

Because the offense is prosecuted in the name of the People and the violation is essentially against public order and statutory regulation, there is usually no private civil claim to prosecute.

2. A private prosecutor ordinarily has no substantial independent role

If there is no offended party claiming civil liability ex delicto, there is little basis for the private prosecutor’s appearance other than perhaps as an observing or assisting lawyer for a complainant-witness. But that is not the traditional procedural role of a private prosecutor.

3. The mere existence of a “complainant” does not automatically justify a private prosecutor

In criminal procedure, a person who reports an offense is not necessarily the offended party in the juridical sense relevant to Rule 111. In many firearms cases, the complainant is simply the police officer or law enforcer who initiated the complaint. That does not create private civil liability in his favor.

Thus, in a pure illegal possession case, a private prosecutor’s participation is usually minimal, if not legally superfluous.

VIII. Can a private prosecutor still appear in an RA 10591 case?

Yes, but only under constrained conditions

A private prosecutor may participate if all or most of the following are present:

There is an identifiable offended party with a legal interest in the civil aspect.
The civil action has not been waived, reserved, or previously filed separately.
The appearance is made under the direction and control of the public prosecutor.
The court allows the appearance or at least recognizes it on record.
The private prosecutor does not displace the public prosecutor in the handling of the criminal action.

Without these conditions, the appearance can be objected to.

In practical terms

A private prosecutor may properly appear where:

the RA 10591 count is being tried together with or alongside a crime against persons or property;
the private complainant suffered death, injury, or property damage;
the lawyer’s participation is really directed toward the damages aspect of the criminal case.

Even then, the lawyer should be careful not to argue as though he exclusively represents the People of the Philippines.

IX. The doctrine of “direction and control” in concrete terms

The phrase “under the direction and control of the prosecutor” is not decorative. It has real procedural consequences.

A private prosecutor cannot validly:

present evidence over the objection of the public prosecutor where the latter refuses to sponsor it;
move for dismissal or insist on continuation contrary to the public prosecutor’s considered stance;
conduct trial as though he is the sole prosecuting officer while the public prosecutor is absent, except in situations tolerated by the rules and court, and even then only in a derivative capacity;
sign pleadings that by law belong to the prosecutor, such as those affecting the criminal action in the name of the People;
appeal the acquittal or the criminal aspect independently.

A private prosecutor may usually:

assist in examining witnesses;
submit questions through direct participation allowed by the court;
argue matters affecting the civil liability;
oppose issues that would prejudice the civil action;
file pleadings or memoranda relating to the civil aspect, subject to procedural rules and the prosecutor’s control.

In RA 10591 cases, this means that even when a private prosecutor is allowed to appear, the public prosecutor must remain visibly in charge.

X. Must the public prosecutor be physically present at all times?

This is one of the most litigated practical issues.

The better rule in Philippine procedure is that the criminal action remains under the direction and control of the public prosecutor. Courts have tolerated varying trial practices, but the safest and most orthodox position is:

the public prosecutor should be present and in charge;
if a private prosecutor conducts an aspect of the proceedings, it should be with the knowledge, authority, and supervision of the public prosecutor;
complete takeover by a private prosecutor is vulnerable to objection.

In a firearms case with no civil aspect, the absence of the public prosecutor becomes even more problematic, because the only legitimate prosecutor of the criminal action is the State prosecutor.

Defense counsel who sees a private prosecutor effectively trying a standalone RA 10591 case without meaningful prosecutorial supervision has a real procedural point to raise.

XI. RA 10591 and the concept of the “offended party”

Whether a private prosecutor may appear often turns on a deceptively simple question:

Who is the offended party in a firearms case?

1. In pure illegal possession cases

The practical answer is often: none in the private-law sense. The injury is to public order and the State’s regulatory authority.

The arresting officer is not the offended party merely because he made the arrest or seized the firearm.

2. In cases involving actual private injury

The offended party may be:

the person shot,
the heirs of a deceased victim,
the owner of damaged property,
or another directly injured person.

But if the information before the court is only for a standalone RA 10591 offense, caution remains necessary. The existence of a related factual victim does not automatically mean that the victim has a civil action arising from that particular statutory offense. The claim may arise more naturally from homicide, murder, physical injuries, or damage to property.

3. Importance of matching the civil claim to the offense charged

This is frequently overlooked. A private prosecutor should be able to explain:

what civil liability is being claimed;
that it arises from the offense charged in that case;
and that the claimant is the offended party for that offense.

In a pure firearms-possession case, that explanation is often weak.

XII. Civil liability in RA 10591 cases

A. Is there civil liability ex delicto in every criminal case?

As a broad proposition, criminal liability may carry civil liability. But in actual procedure, not every statutory offense generates a practical, recoverable civil award in favor of a private person.

For many RA 10591 offenses, there may be:

criminal liability;
confiscation/forfeiture consequences;
regulatory sanctions;
imprisonment and fine;

but no meaningful private civil damages unless the offense also caused identifiable personal or property injury.

B. Why this matters for private prosecutors

The private prosecutor’s role is strongest where there is a concrete claim for:

actual damages,
moral damages,
temperate damages,
exemplary damages,
civil indemnity,
funeral and burial expenses,
medical expenses,
loss of earning capacity,
or property repair/replacement.

Those heads of damages are easy to see in homicide, murder, physical injuries, or damage to property. They are much harder to locate in a standalone “possession of loose firearm” prosecution.

C. Confiscation is not a private civil claim

The forfeiture or confiscation of an unlicensed firearm is not a civil recovery belonging to a private complainant. It is a statutory consequence benefiting the State, not an injured private party. A private prosecutor cannot use that as the basis for independent participation.

XIII. Preliminary investigation stage vs. trial stage

Private lawyers often participate even before trial, especially during complaint filing and preliminary investigation. The legal basis and implications differ by stage.

1. During complaint filing and preliminary investigation

A complainant may of course be assisted by private counsel in:

preparing affidavits,
assembling documentary evidence,
attending clarificatory hearings,
filing motions for reconsideration before the prosecutor.

This is common and usually unproblematic.

In an RA 10591 complaint, a private lawyer may represent a reporting witness or interested party before the prosecutor’s office. But that does not convert the lawyer into an independent public prosecutor.

2. Upon filing of the information in court

Once the information is filed, prosecution is formally in the hands of the public prosecutor. At this point, the private lawyer’s role depends on whether there is a civil aspect and whether the court recognizes the appearance as private prosecutor.

The transition from investigative assistance to actual trial participation is where procedural limits become stricter.

XIV. What if the case is for murder or homicide with use of an unlicensed firearm?

This is an area that often creates confusion because firearms law intersects with the Revised Penal Code.

Philippine law has long grappled with the treatment of illegal possession of firearm used in the commission of another crime. Different statutory eras produced different rules. Under later legislation, including RA 8294 and then RA 10591, the relationship between the firearms offense and the accompanying felony was modified from older doctrine.

For present purposes, the important point is procedural:

where the facts involve a killing or wounding by firearm,
and there is a prosecutable offense against person with a private offended party,
private prosecutors for the heirs or victim may certainly participate in the prosecution of the civil aspect of that crime, under the direction and control of the public prosecutor.

But that does not mean the private prosecutor acquires autonomous authority to prosecute the standalone regulatory firearms violation as though it were his own case. If there are separate informations, the court should remain clear about which civil interest supports his appearance in which case.

XV. May the private prosecutor file motions, examine witnesses, and argue objections in a firearms case?

Yes, but with limits

Where properly recognized, a private prosecutor may do the usual acts of assisting counsel, such as:

appearing during arraignment and pre-trial;
participating in marking of exhibits;
conducting or supplementing direct examination;
conducting cross-examination on matters relevant to the civil aspect;
making objections;
offering documentary and testimonial evidence on damages;
filing memoranda on the civil liability.

Limits especially relevant in RA 10591 cases

In a standalone illegal possession case, the private prosecutor’s involvement in witness examination may be challenged where:

there is no civil claim to support his intervention;
the public prosecutor is not meaningfully participating;
the private prosecutor appears to be controlling the theory of the criminal case.

Courts often allow some practical leeway, but from a strict legal standpoint, the farther the case is from a private civil injury, the narrower the basis for private intervention.

XVI. Can the private prosecutor appeal?

A critical distinction must be observed:

1. Criminal aspect

The criminal action belongs to the State. The private prosecutor cannot independently prosecute an appeal in the name of the People without the authority of the Office of the Solicitor General or the proper prosecutorial authority, depending on the stage and forum.

He cannot appeal an acquittal in the criminal aspect simply because he disagrees with it.

2. Civil aspect

The offended party may have remedies regarding the civil aspect, subject to the nature of the judgment and the procedural posture of the case.

Thus, in an RA 10591-related case where there is a genuine civil claim, the private complainant may contest rulings affecting civil liability, but not usurp the State’s control over the criminal prosecution.

In a pure firearms-possession case with no real civil component, this distinction often leaves almost nothing for a private prosecutor to independently pursue.

XVII. What happens if there is no reservation of the civil action?

If there is a valid offended party and the civil action is not waived, reserved, or separately filed, the civil action is generally deemed instituted with the criminal case. That is the normal gateway for a private prosecutor.

But in many RA 10591 cases, the central problem is earlier than reservation:

Is there even a civil action ex delicto in favor of a private offended party to begin with?

If the answer is effectively no, then the absence of reservation does not create a meaningful field for private prosecution.

XVIII. Situations where private prosecutor participation is strongest in firearms-related litigation

The strongest cases for participation are not the pure regulatory prosecutions but the firearms-related cases with personal or property injury, such as:

Shooting incidents
- murder
- homicide
- frustrated or attempted homicide
- physical injuries
Property injury
- malicious damage or other property damage caused through firearm use
Compound factual situations
- robbery, threats, coercion, or similar crimes involving firearm use, where a private offended party has recoverable damages

In these situations, the private prosecutor’s role is usually easier to justify because the civil action is real and concrete.

XIX. Situations where private prosecutor participation is weakest in RA 10591 litigation

The weakest cases include:

Standalone possession of loose firearm
Standalone unlawful possession of ammunition
Standalone possession of parts or accessories without authority
Tampering/obliteration of serial number without associated private injury
Unlawful manufacture, sale, transfer, or dealing prosecuted as regulatory violations only
Carrying outside residence without authority, without injury to any private person

In such cases, the defense can credibly argue that:

there is no offended party in the Rule 111 sense;
there is no civil action ex delicto to be protected;
hence there is no meaningful legal need for a private prosecutor.

XX. Objections the defense may raise

In firearms cases, defense counsel may object to a private prosecutor’s participation on any of the following grounds:

1. Lack of legal standing as private prosecutor

Because there is no private offended party with civil liability to recover.

2. Absence of public prosecutor control

Because the private prosecutor appears to be handling the case independently.

3. Improper assumption of prosecutorial powers

Because the private prosecutor is filing or arguing matters reserved to the public prosecutor.

4. No showing that civil action is deemed instituted

Because the basis for the civil aspect is not identified.

5. Mismatch between the offense charged and the alleged private injury

Because the civil injury may arise from another offense, not from the RA 10591 count.

These objections do not automatically invalidate all prior proceedings, but they can matter significantly, especially if the error is serious and prejudicial.

XXI. What should the prosecution and court do to avoid procedural problems?

The cleanest practice in RA 10591 cases is to clarify the record early.

At arraignment or pre-trial, the court should determine:

Who is the offended party, if any?
What civil liability is being claimed?
Is the civil action deemed instituted, reserved, waived, or separately filed?
What is the capacity of the private lawyer?
- assisting private prosecutor for the civil aspect?
- counsel for a witness/complainant only?
Is the public prosecutor present and in control?

This avoids later confusion over whether the private prosecutor has any valid participatory role.

XXII. The special role of police officers and law enforcers in firearms cases

Because RA 10591 is heavily enforced by police and firearms regulatory authorities, another source of confusion is the role of law-enforcement complainants.

A police officer may:

make the arrest,
seize the firearm,
execute affidavits,
file the complaint before the prosecutor,
testify as a witness,
assist in evidence handling.

But ordinarily, the police officer is not transformed into the “offended party” entitled to civil damages merely by reason of enforcement activity.

Thus, hiring a private lawyer for the police complainant does not, by itself, create a valid procedural basis for private prosecution of the criminal case.

XXIII. Jurisprudential principles that illuminate the issue

Even without focusing on a single firearms-specific decision, several established doctrinal lines in Philippine law frame the answer:

1. Criminal prosecutions are under the control of the prosecutor

This is basic and repeatedly affirmed.

2. Private prosecutors act only in aid of the public prosecutor

They do not possess independent prosecutorial authority.

3. The offended party’s intervention is tied to the civil action

The private complainant’s participation is not equivalent to ownership of the criminal case.

4. Civil liability must correspond to the offense and the offended party

Not every complainant has a civil claim arising from every statutory offense.

5. Public-order offenses often lack a private civil claimant

This is especially relevant to regulatory crimes such as many standalone firearms violations.

These principles, read together, strongly support a restrained view of private prosecutor participation in pure RA 10591 prosecutions.

XXIV. Does the absence of a private prosecutor affect the validity of the case?

Generally, no. The criminal action proceeds validly through the public prosecutor alone.

In fact, in most standalone firearms cases, that is the norm and the legally cleaner arrangement.

The absence of a private prosecutor does not weaken the State’s case. Proof still depends on the usual elements:

lawful arrest/seizure issues where relevant,
chain and identity of the firearm or ammunition,
licensing or non-licensing certifications,
possession and control,
intent where relevant,
compliance with evidentiary rules.

Those are public-prosecution matters.

XXV. Does improper participation by a private prosecutor automatically void the proceedings?

Not necessarily. Philippine procedural law generally asks whether there was prejudice and whether the public prosecutor remained in control or at least substantially participated.

Still, serious irregularities can create reversible issues, especially where:

the private prosecutor effectively took over the criminal case;
the public prosecutor was absent or nominal only;
the defense timely objected;
the case involved no civil aspect justifying private intervention.

Thus, while not every irregular appearance is fatal, the safest course is to keep the private prosecutor within proper bounds.

XXVI. A practical framework for judges handling RA 10591 cases

A trial judge can use this quick analysis:

Step 1: Identify the exact information

Is the case:

a standalone firearms regulatory offense, or
a case with an injured private victim?

Step 2: Ask whether there is a real civil action ex delicto

If none appears, the need for a private prosecutor is doubtful.

Step 3: Clarify the lawyer’s role on record

Is he:

counsel for the complainant,
private prosecutor for the civil action,
or merely assisting with leave?

Step 4: Ensure prosecutorial control

The public prosecutor must remain in charge.

Step 5: Limit participation to proper matters

Especially in standalone RA 10591 cases.

This approach is doctrinally sound and administratively efficient.

XXVII. A practical framework for defense counsel

When confronting private prosecutor participation in a firearms case, defense counsel should ask:

What is the offense charged?
Who is the offended party?
What civil injury is alleged?
Was the civil action deemed instituted?
Is the public prosecutor present and directing the proceedings?
Is the private prosecutor trying to control the criminal theory?

If the answers show that the case is merely a regulatory firearms prosecution with no private civil claim, defense counsel has a substantial basis to object.

XXVIII. A practical framework for private complainants and their lawyers

For complainants and private counsel, the safer and more accurate approach is to distinguish between two situations:

1. Pure regulatory firearms case

Recognize that the State, through the public prosecutor, is the primary actor. Private participation is limited and may not be necessary.

2. Firearms-related case with actual personal or property injury

A private prosecutor may properly participate to protect the civil claim, but should make clear:

the identity of the offended party,
the civil damages sought,
and the fact that all participation is under prosecutorial control.

This avoids overreaching and procedural vulnerability.

XXIX. Important misconceptions

Misconception 1: “Any complainant may hire a private prosecutor to handle the criminal case”

Incorrect. A private lawyer does not become an independent prosecutor merely because a complainant retained him.

Misconception 2: “The private prosecutor may prosecute whenever the public prosecutor is absent”

Dangerously overbroad. The criminal action remains under public-prosecutor control. Routine substitution without proper basis is questionable.

Misconception 3: “Every criminal case has an offended party entitled to private damages”

Not in the practical sense needed for private prosecution. Many regulatory crimes primarily injure the State.

Misconception 4: “In illegal possession of firearm, the arresting officer is the offended party”

Generally incorrect.

Misconception 5: “Because a gun was involved, the victim’s lawyer may prosecute every related firearms count”

Only partly true. The legal basis must be tied to the civil action and the offense charged.

XXX. Bottom-line conclusions

1. Private prosecutor participation in RA 10591 cases is not prohibited per se

It is legally possible within the general framework of Philippine criminal procedure.

2. But the public prosecutor always retains direction and control

That rule is absolute in principle.

3. The private prosecutor’s normal basis is the civil action ex delicto

Without a real private civil interest, the justification for participation becomes weak.

4. In standalone firearms regulatory offenses, private prosecutor participation is often unnecessary and doctrinally limited

Examples include pure illegal possession, unlawful possession of ammunition, carrying without authority, and similar offenses lacking a private victim.

5. In firearms-related cases involving death, injury, or property damage, private prosecutor participation is more clearly proper

But even there, it remains subordinate to the public prosecutor and is tied to the civil aspect.

6. Courts should clarify early whether there is an offended party, a civil action, and a lawful basis for the private prosecutor’s appearance

This avoids confusion and preserves procedural regularity.

XXXI. Final synthesis

In Philippine law, the best view is that private prosecutor participation in RA 10591 firearms cases depends less on the label of the statute and more on the nature of the offense and the existence of a genuine private civil interest.

Where the case is a pure public-order/regulatory prosecution, the criminal action belongs almost entirely to the State, and the room for a private prosecutor is correspondingly narrow. Where the firearms violation is joined with or factually linked to a crime that injures a private person, a private prosecutor may properly appear to protect the civil claim, but never as a substitute for the public prosecutor.

So, on the specific question:

May a private prosecutor participate in RA 10591 firearms cases? Yes, but only in a limited, subordinate, and usually civil-aspect-oriented role under the direction and control of the public prosecutor. In many standalone RA 10591 prosecutions, there may be little or no proper basis for meaningful private prosecutor participation at all.

Cited legal anchors for further formalization

For turning this into a more law-review style piece, the most important legal anchors to organize around are:

Republic Act No. 10591
Rule 110, Rules of Criminal Procedure
Rule 111, Rules of Criminal Procedure
the settled doctrine that criminal actions are prosecuted under the direction and control of the public prosecutor
the doctrine that a private prosecutor appears only to protect the civil interest and only in subordination to the public prosecutor

A stricter law-review version of this piece would next add full case annotations under those doctrinal headings.