One of two men charged in a devastating assault on a San Francisco Giants fan outside Dodger Stadium told his own mother that he was involved and expected to "go down" for the attack.

Marvin Norwood was heard making the statement in a videotape played Wednesday during his preliminary hearing. He was talking to his mother by cellphone during an interview with police about the attack on victim Bryan Stow.

"Mom, you good?" Norwood says on the phone borrowed from one of the detectives. "You sure? Hey, I got arrested for that Dodger Stadium thing."

After a brief pause, he adds, "I was involved. I was. To a certain extent I was."

Moments later, he says, "I will very certainly go down for it."

Stow, a paramedic from Santa Cruz, suffered brain injuries in the attack on opening day of 2011. The beating prompted public outrage and led to increased security at Dodgers games.

In the recording, Norwood mentions the name of his co-defendant, Louie Sanchez. His last words on the conversation were, "I'm sorry."

The detective who interviewed Norwood on July 21, 2011, testified about the conversation at the preliminary hearing where a judge will determine if there is enough evidence for Norwood and Sanchez to stand trial on charges of mayhem, assault and battery, and inflicting great bodily injury.

Both have pleaded not guilty, and their lawyers suggested on cross-examination that they might have been involved in some other incident, not the attack on Stowe.

Police detective Howard Jackson, the first witness, said Norwood told him at one point that there were a number of fights in the parking lot and that Norwood didn't think he was involved in the Stowe incident.

However, Jackson said Norwood told him he saw blood after Sanchez punched a Giants fan.

Two more witnesses who attended the March 31, 2011, game told of being bothered by Sanchez, who was throwing peanuts and spraying soda on a woman in the bleachers.

Pictures that witness Marc Lu took from his seat were projected on a large screen clearly showed Sanchez sitting next to Lu's group. At the end of the game, Sanchez sprayed a bottle of soda, said Lu, who was wearing a Giants T-shirt at the game.

"We were kind of staring at him in disbelief. He was facing us, kind of staring us down, looked like he was ready to fight." said Lu, who said Norwood was with Sanchez.

Prosecutors called five more witnesses who had seats near Sanchez and Norwood at the game. They told of the peanut-pelting and said Sanchez was drunk and dousing Giants fans with soda.

Some of the witnesses said they intervened to keep a fight from breaking out in the bleachers.

Kathryn Gillespie, who was hit with peanuts and drenched with soda, said she held her boyfriend back when a confrontation with Sanchez appeared imminent. She is named as a victim of battery in the complaint.

"We just wanted to leave the situation and get out of there safely," she said.

"And is that what you did?" asked Deputy District Attorney Beth Silverman.

"Yes," said Gillespie. "Finally we just went in our own direction and never looked back."

The hearing was to continue Thursday.