This is probably more of a reddit thread than a HN thread, but it seems unlikely that he would make up a story about a robbery in that case.
Unless the step father robbed the store as a cover for the actual motive.
Also, given he opened the safe and called the police a few minutes later, what happened to the money from the safe.
Unless the step father robbed the store as a cover for the actual motive.
Also, given he opened the safe and called the police a few minutes later, what happened to the money from the safe.