We're told cops were on patrol under the Harbor Freeway when they saw Zac and a man he identified as his bodyguard.  Cops saw Zac and the other guy in a full-blown melee with at least 3 other people.

After breaking up the fight, cops questioned Zac. He told them they had run out of gas and were sitting in the car.  Zac said while waiting for a tow truck they threw a bottle out the window -- he never said what was in the bottle -- and it smashed on the pavement near a group of transients.

Zac said the transients confronted him and the bodyguard because they believed the pair hurled the bottle at them. Zac says 2 of the transients attacked the bodyguard and when Zac got out of the car to help, he got cold cocked in the mouth.