After the initial argument between Motley and Livingston, Motley walked toward the security guard holding a beer can and a lit cigarette asking Livingston, “Let’s talk like men,”
Almost certainly what really happened is the scumbag decided to go confront the security guard physically and the security guard thought he needed to defend himself.
And you know that because...?
Loud music is offensive. Vulgar loud music - especially "music" that mixes vulgarity with the N word is doubly offensive and should be illegal (IMHO).
I think the music should be played, at the volume it was during the incident, during the entire trial.