noun
principal offense; principal offender
Legal term referring to the main crime or the person who directly commits it, as opposed to an accomplice (共犯).
See also: 共犯
彼は強盗の正犯として起訴された。
He was indicted as the principal offender in the robbery.
正犯と共犯では刑の重さが異
The severity of punishment differs between a principal offense and complicity.