His name was heard on the police scanners. He was apparently known to the victims. He had attended the meeting/Christmas party possibly to assure that a certain target, or targets, was there. He got in an argument, angrily left, and returned with two the other two heavily armed shooters. One reportedly had a pipe bomb. All I believe they said had black beards, or "scruffy" faces.
It has felt like an assassination from the moment I heard it.
Could be gang/mussie type hit on someone of little importance to the rest of us, but it still seemed like a hit.