A woman who saw two men harassing San Francisco Giants fans before a brutal beating in a Dodger Stadium parking lot testified Thursday about the volatile atmosphere after the 2011 opening day game.

Anna Maria Davila told a judge about encountering two men who matched the descriptions of defendants charged in the attack on Santa Cruz paramedic Bryan Stow.

Davila said one of the men was taunting Giants fans and punched a teenage boy who backed off.

She described a generally troubling atmosphere.

"I was annoyed by their behavior," she said. "There were a lot of fans coming by, and there were a lot of slurs being said (about) the Giants, a lot of profanity."

Moments after the first encounter, Davila said one of the men told her, "'that's how we do it."'

Then, she said, the men turned their attention to a group of four Giants fans in their 30s. She didn't see a confrontation but said the men came running back a few minutes later, jumped into a car and shouted at a woman at the wheel, "'Drive, Drive!"' and they took off.

However, she could not positively identify defendants Louie Sanchez and Marvin Norwood. Both have pleaded not guilty. A judge will decide after the hearing if there is enough evidence to send them to trial in the Stow beating.

The case is fraught with undercurrents for the city where Dodger Stadium has long been a baseball landmark. The beating prompted public outrage and led to increased security at Dodgers games.

Lawyers for Sanchez and Norwood have suggested they might have been involved in other altercations that day but not the attack of Stow.