Ch-Ch-Changes

"Pierce is hired to determine the competency of a convicted murderer who has been granted a new trial. After examining the killer, who had subsequently suffered a brain injury and now exhibits a completely changed personality, Pierce asserts that he is essentially no longer the same person and should no longer be held accountable for the murder. His work puts him at odds with the new prosecutor Donnie Ryan, who doesn't like the fact that Pierce is interfering with his case, or that he is such good friends with Kate, his soon to be ex-wife." (IMDb)