Its scary to be in an AA meeting when someone is off...especially talking "homicide"....
I'm wondering if there are other AA meetings around where you wouldn't have to worry when you attend about this one individual?
I went to AA meeting for 8 years straight...and I would say there was only about 5 times in that 8 years that someone was off...either drunk...or acting out as this person did in your meeting....
I did the same as you...I left as I have control over me and nothing else.
I would try the meeting again...if he is there and you don't feel comfortable...leave.