Particeps criminis
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
A participant in a crime; an accomplice. One who shares or co-operates in a criminal offense, tort, or fraud.
Alberger v. White, 117 Mo. 347, 23 S. W. 92; State v. Fox, 70 N. J. Law, 353, 57 Atl. 270.