Meanings of sentence for a crime in English

He is currently serving a life sentence for a crime he claims he didn't commit.

This is in the hope of saving his brother from a death sentence for a crime he was falsely accused of.

In the stolidity with which he received this sentence for a crime which he had not committed, spoke who knows what trait of inherited savagery?

However, he thanked Judge Conlon for giving Sampieri an "unprecedented" sentence for a crime of this nature, which he hoped would act as a deterrent.