Perpetrators
Perpetrators & Co-Perpetrators
Who counts as a perpetrator of the crime.
The perpetrator
A PERPETRATOR is someone whose own conduct satisfies all the elements of the crime, or who is liable through the common-purpose doctrine. Several people may be CO-PERPETRATORS — each satisfying the definition, or each liable because they acted with a common purpose.
Participation vs inchoate crimes
Participation asks WHO is liable for a crime that is committed. It is different from the inchoate crimes (attempt, conspiracy, incitement), which impose liability even where the substantive crime is never completed.
A perpetrator satisfies the crime's elements personally or via common purpose. Co-perpetrators are each liable as principals.
Common purpose
The Common-Purpose Doctrine
The group's conduct is imputed to each participant.
The doctrine
Where two or more people share a COMMON PURPOSE to commit a crime, the conduct of each participant in furthering that purpose is IMPUTED to the others. The State need not prove which participant's act caused the result — individual causation is not required (Safatsa).
Two forms
- PRIOR AGREEMENT (mandate) — the participants agreed in advance to commit the crime
- ACTIVE ASSOCIATION — no prior agreement, but the accused associated themselves with the crime as it was committed
The Mgedezi requirements (active association)
- The accused was PRESENT at the scene
- They were AWARE of the assault/crime
- They INTENDED to make common cause with those committing it
- They performed an ACT OF ASSOCIATION manifesting that shared purpose
- They had the required MENS REA (intention to kill, or foresight of the possibility of death)
Timing and constitutionality
For murder on active association, the association must occur BEFORE the deceased is fatally wounded (Motaung). The doctrine is constitutionally valid — it does not offend the presumption of innocence, because the State still proves each accused's own association and mens rea (Thebus), which also discussed effective dissociation.
Common purpose imputes the group's conduct to each participant (no need to prove individual causation — Safatsa). Two forms: prior agreement or active association (Mgedezi). Association must precede the fatal wound (Motaung); the doctrine is constitutional (Thebus).
Key Cases — Common Purpose
S v Safatsa1988 (1) SA 868 (A)Common purpose imputes each participant's conduct to the others; the State need not prove which act caused the death.
Facts. The "Sharpeville Six." During township unrest, a crowd attacked the home of the deputy mayor of Lekoa, stoned him, set his house alight and killed him. Six accused were convicted of murder on the basis of common purpose, although it could not be proved which individual act actually caused the death.
Legal question. Must the State prove that each participant's own conduct causally contributed to the death, or does the doctrine of common purpose impute the conduct of the group to each participant who shares the purpose?
Judgment. The Appellate Division upheld the murder convictions, holding that proof of individual causation is not required where common purpose is established. Each participant is liable for the killing as if the act were his own.
Significance. The leading authority affirming the doctrine of common purpose and that individual causation need not be proved. Controversial as an apartheid-era decision, its constitutionality was later confirmed in Thebus.
Exam tip. Common purpose removes the need to prove who struck the fatal blow. Distinguish the prior-agreement (mandate) form from the active-association form (Mgedezi), and watch the timing limit set by Motaung.
S v Mgedezi1989 (1) SA 687 (A)The five requirements for common purpose by active association: presence, awareness, intent to make common cause, an act of association, and mens rea.
Facts. Mineworkers attacked and killed members of mine management during a labour dispute. Several accused were convicted on common purpose despite no proven prior agreement to kill. The court had to set out when liability arises through active association alone.
Legal question. What must be proved to convict an accused on common purpose where there was no prior agreement (mandate) to commit the crime?
Judgment. The Appellate Division laid down the five requirements for common purpose by active association — the "Mgedezi requirements."
Significance. The definitive statement of the requirements for active-association common purpose, applied in every common-purpose case since.
Exam tip. Memorise the five Mgedezi requirements: presence, awareness, intent to make common cause, an act of association, and mens rea. Apply each to the facts in turn.
S v Motaung1990 (4) SA 485 (A)For murder on active association, the accused must associate before the deceased is fatally wounded.
Facts. During a mob killing the question arose whether an accused who associated himself with the assault only after the deceased had already been fatally (mortally) wounded could be convicted of murder on common purpose.
Legal question. Can a participant who joins the common purpose only after the victim has already received the fatal injury be convicted of murder on that basis?
Judgment. The Appellate Division held that the moment of association relative to the infliction of the fatal wound is decisive; association only after the mortal wound cannot found a murder conviction on common purpose.
Significance. Refines Safatsa and Mgedezi by fixing the temporal limit of common-purpose liability — association must precede the fatal wound.
Exam tip. Timing matters: if the accused associated only after the deceased was already fatally injured, common-purpose murder fails. Read alongside Safatsa (imputation) and Mgedezi (requirements).
S v Thebus2003 (6) SA 505 (CC)The common-purpose doctrine (active association) is constitutional and does not infringe the presumption of innocence; effective dissociation must be clear and timely.
Facts. During a confrontation in a community-policing incident, shots were fired; a child was killed and others wounded. The accused were convicted on common purpose (active association) and challenged the constitutionality of the doctrine.
Legal question. Is the doctrine of common purpose, in its active-association form, consistent with the Constitution — in particular the rights to dignity, freedom and the presumption of innocence?
Judgment. The Constitutional Court upheld the constitutionality of the common-purpose doctrine and dismissed the challenge.
Significance. The modern constitutional foundation of common purpose — it confirms that Safatsa and Mgedezi survive constitutional scrutiny. The Court also discussed withdrawal/dissociation from a common purpose.
Exam tip. Use Thebus to answer "is common purpose constitutional?" Note its discussion of dissociation — effective withdrawal must occur before the crime and be a clear, unequivocal act of disengagement.
Accomplices
Accomplices
Furthering another's crime without being a perpetrator.
Who is an accomplice
An ACCOMPLICE does not satisfy all the definitional elements of the crime (they are not a perpetrator) but consciously FURTHERS its commission — by facilitating, assisting, or enabling it — with the required intention. Accomplice liability is accessory: there must be a perpetrator who commits (or attempts) the crime.
Distinguish from co-perpetrators
A co-perpetrator satisfies the definition (or acts on a common purpose); an accomplice merely helps a perpetrator. The distinction matters for how liability is framed, though both may attract the same punishment.
An accomplice furthers a perpetrator's crime, with intention, without themselves fulfilling all its elements. Accomplice liability is accessory — it presupposes a perpetrator.
After the fact
Accessory After the Fact
Helping the offender escape justice after the crime.
Who is an accessory after the fact
An ACCESSORY AFTER THE FACT is a person who, AFTER the crime has been completed, unlawfully and intentionally helps the perpetrator to evade justice — for example by hiding the offender, destroying evidence, or misleading investigators.
Distinguish the forms of involvement
CONSPIRACY (inchoate) punishes the prior agreement itself and needs no completed crime; COMMON PURPOSE imputes participation in the completed crime; an ACCESSORY AFTER THE FACT acts only after completion. A conspirator whose plan is carried out may be liable as a co-perpetrator without invoking common purpose (Nooroodien).
Accessory after the fact = intentionally helping the offender escape justice AFTER the crime. Distinguish conspiracy (before, inchoate), common purpose (during), and accessory (after).
Key Case — Forms of Participation
S v Nooroodien1998 (2) SACR 510 (NC)A conspirator whose conspiracy is executed may be convicted as a co-perpetrator, without relying on the common-purpose doctrine. A provincial decision — persuasive, not binding; followed in Mmotla v S [2024] ZAGPPHC 362.
Facts. Accused were charged in connection with a planned killing, raising the relationship between liability as a conspirator and liability under the common-purpose doctrine.
Legal question. Can a conspirator whose plan is carried out be convicted as a co-perpetrator without invoking common purpose?
Judgment. The Northern Cape court held that a conspirator whose conspiracy is executed may be convicted as a co-perpetrator, without recourse to common purpose.
Significance. A provincial division decision — persuasive, not binding — but a practically useful one: it shows that where a prior agreement is proved and carried out, the State need not run the common-purpose argument at all. It was followed on exactly this point in Mmotla v S [2024] ZAGPPHC 362 at para [30].
Exam tip. Use Nooroodien for one narrow point: an executed conspiracy can ground co-perpetrator liability directly. Note its weight — a Northern Cape provincial judgment, persuasive only. For the requirements of common purpose itself go to Mgedezi (and Thebus for its constitutionality); Nooroodien is not authority for those.