noun
direct principal offender; direct perpetrator
Legal term for a person who directly commits a crime, as opposed to an indirect principal (間接正犯). Used in criminal law contexts.
See also: 間接正犯
Direct principal offender is a legal term for a person who personally committed the crime.
この事件では、彼が直接正犯として起訴された。
In this case, he was indicted as the direct perpetrator.