A little too convenient.
According to reports, the note he left gave details of the murder scene that had never been made public. There is also a lot of forensic evidence (DNA, ballistics, fingerprints) that will easily confirm whether he is the killer. If he is, I'm glad he offed himself.
Seems that way.
Supposedly there was a finger print recovered from the broken basement window. That would settle it.
Otherwise how do we know if the perp didn't setup this guy to take the fall?