I spent a bunch of time searching and finally found the mention in the shooting incidents thread:
https://pistol-forum.com/showthread....=1#post1406578
Anyway, the local Law Enforcement folks had a suspect and formally charged him.
https://news.yahoo.com/joseph-kenned...193631875.html
Apparently the boys-in-bits were going to go rob a dude that runs a scrap yard; he turned out to be a tougher nut to crack than they thought.
(I would still guess he was an organized crime associate; something about the circumstances yells drug distribution to me. I wonder if they were lured there, or it was truly a case of FAFO.)