I am trying to help a friend reopen his case he has already served 10 years. His orig charge was attemped murder.

My friend was involved in a robbery that resulted in him firing a gun and shooting his own friend. It was an accident he didnt mean to shoot his friend. He had no priors, no gang affiliation this was his first offense. He hired a private attorney and was told the most time he would serve would be 4 years. At the end of his trial he had a weapons charge and he was given life.