Article 18 Revised Penal Code
Article 18 of the Revised Penal Code is about Accomplices. It is under Chapter Five (Alternative Circumstances) of Title Two (Persons Criminally Liable For Felonies) of the Code.
Accomplices
Accomplices are those persons who, not being included in Article 17, cooperate in the execution of the offense by previous or simultaneous acts.
See also: Article 17 Revised Penal Code