I've heard it said that the defense lawyers job is to make sure that the court does their job and the prosecution does their job and the police did their job.

I've heard it said that the defense lawyers job is to make sure that the court does their job and the prosecution does their job and the police did their job. They may know that the person is going to be sentenced to death, but they still need to make sure that the state does everything right because that's the only ethical thing to do.