From a legal perspective, McGlockton’s past criminal history is irrelevant unless you can show the shooter was aware of it. That was one of the key issues in the Harold Fish case. They attempted to show the man he shot had a past history of rage and anger issues. The judge shut it down because there was no indication Mr. Fish knew that.
On appeal,
Mr. Fish was allowed to use that evidence because the prosecution opened the door through a basic mistake.