I haven't come across any information that indicated anyone has been charged.

Irv Weiner was accompanying Dorfman to lunch when he was gunned down in a parking lot. Best I recall, 6-7 .22 shots to the head. Weiner wasn't harmed.

I believe Spilotro was in Vegas and Lombardo was locked-up at the time Dorfman was murdered. Lots of suspects have been mentioned, but none charged as far as I can remember.