perpetrator

例句：

1. 1.The perpetrator was caught on cameracommitting the crime.
   犯罪者被摄像头拍到犯下了罪行。
2. 2. Thepolice are investigating the caseof the recent murder.
   警方正在调查最近发生的谋杀案。
3. 3. The perpetrator must face justice for their actions.
   犯罪者必须为他们的行为面对正义。