If you want to know how accused people end up innocent in a court of law, just ask a Los Angeles Federal Criminal Defense Attorney.  Whose job it is to make sure that those accused of crimes come out of court smelling like a rose.  So long as an accused person does what their defense attorney wants them to, and there is no evidence against them, they will walk out of court.  If the accused person doesn’t listen to their attorney they can end up in jail for life.  No one wants to go to jail for life, so listening to your defense attorney is definitely an important thing.