Petrov appeared Wednesday at the San Francisco Superior Court on felony drug charges stemming from 2014.
The Alameda County Sheriff's Office placed two deputies on leave in connection with the November beating and a third deputy on leave who allegedly bribed witnesses with the victim's gold chain.
WATCH VIDEO: Alameda County deputy beating case prompts policy change
Petrov's attorneys said he was struck more than 40 times, causing multiple head lacerations and fractures in both his hands. "Horrible I can't do nothing. I'm a mechanic by trade so, I can't use my hand, I can't even text on a cellphone," Petrov said.
Perov's mother said her son is suffering considerably. "My son absolutely traumatized," Olga Perov said.
On Tuesday, Sheriff Greg Ahern said for now, deputies' body worn cameras will be activated at all times. "It's incumbent on me to make sure the culture of this agency is above reproach," Ahern said.
WATCH VIDEO: Third Alameda County deputy placed on leave suspect beating case
The San Francisco Distict Attorney's Office is investigating the incident involving Alameda County Sheriff's Deputies SantaMaria and Weiber as well as a bribery allegation. That bribe allegedly came from a third deputy, Alameda County Sheriff Deputy Osborne, who is accused of giving Petrov's gold chain to a couple that witnessed the beating in order to silence them.
Since the November incident, ABC7 News has confirmed Petrov was arrested March 8 in connection with controlled substances and a firearm, but he was never charged.
Petrov told ABC7 News it wasn't him. "I don't know what you're talking about man," he said.
By email his attorney said: "Obviously, even if true, that would not affect the moral or legal equation of what happened on November 12."
Petrov's mother said she wants her son to get help. "His life is absolutely horrible. I want him to be officially treated," she said.
She said she would prefer to not specify for what conditions.
Sheriff's Office says it has pic of Petrov's gold necklace on ground after beating but necklace was not booked in evidence @abc7newsBayArea— Melanie Woodrow (@MelanieWoodrow) March 30, 2016
Just in: Alameda Co Sheriff's Office has confirmed to @abc7newsBayArea Deputy Shawn Osburne is on admin leave in connection w/alleged bribe— Melanie Woodrow (@MelanieWoodrow) March 30, 2016
Pictures of the top of Petrov's head being provided by attorney who says he has blunt force injuries & head trauma pic.twitter.com/dTioYrWZsa— Melanie Woodrow (@MelanieWoodrow) March 29, 2016
Picture of Petrov provided by his attorney. Waiting for press conference to begin pic.twitter.com/GxM1WmyeK7— Melanie Woodrow (@MelanieWoodrow) March 29, 2016
Petrov's attorneys say car was a rental not returned in time. Now explaining he was "beat repeatedly." pic.twitter.com/AvexYcF1s2— Melanie Woodrow (@MelanieWoodrow) March 29, 2016
Attorney: Deputy took "trophy photo" w/ victim. Says deputies wrote reports 4 days later. Now talking about gold chain deputy gave as bribe— Melanie Woodrow (@MelanieWoodrow) March 29, 2016
Sheriff Ahern: "We've done some restructuring since incident." pic.twitter.com/Yttvh0TdLS— Melanie Woodrow (@MelanieWoodrow) March 29, 2016
For now on all body cameras will be activated at all times per Sheriff Ahern— Melanie Woodrow (@MelanieWoodrow) March 30, 2016