Additionally, it took another year (after Don's Trial) to get three more Teamsters prosecuted. It is evident on the video, especially in slow motion, that the event was orchestrated (there is a woman snapping her fingers in a timely fashion counting the precise moment when they would attack) and involved the entire mob.
Getting the higher ups who were responsible for this has proven to be, and not surprisingly, FAR more difficult.
I seem to remember some big wig union thug taking off his hat and then all hell broke loose.