He was sane at the time of the murder.

案发生时他神志是清醒。

The police were trying to chase down all possible clues to the murder.

警方设法寻找这起案一切可能。

He was implicated in a murder, and sooner or later they would pick him up.

他和一宗案有牵, 迟早他们会逮捕他。

At the murder trial, he pleaded insanity.

案审理过程中，他以精神失常为由进行抗辩。