I think it would be much harder on Chase to know he’s growing up without a mother because he shot her, not because she committed suicide. Come to think of it, does Chase even know his mother committed suicide?
He didn’t shoot her. She was the drunk irresponsible adult who had a loaded gun in a place where a 4 year old could find it then she tried to pull it out of his hands and it went off. It was an accident caused by her. Much better than possibly inheriting suicidal tendencies from his mother.