Jay Leiderman

Other noteworthy cases Leiderman defended include People v. Diaz, which went to the California Supreme Court and made law on the ability of police to search a cell phone, Louis Gonzalez, who was falsely accused of rape, attempted murder and torture by the mother of his child and was jailed for 83 days before he was released and ultimately found factually innocent, the Andrew Luster or so-called Max Factor heir habeas corpus proceeding, wherein his sentence was reduced by 74 years the first-ever trial of medical marijuana defendants in San Luis Obispo County, California County, and Leiderman represented the lead defendant in Ventura County, California's first concentrated Mexican Mafia prosecution. Leiderman represented journalist Matthew Keys who was found guilty on all charges against him in 2015. Leiderman was the lead trial attorney for Jonathan Koppenhaver, also known as War Machine (mixed martial artist) Koppenhaver was convicted of savagely beating and raping his girlfriend, porn star Christy Mack.

"Within a year at the Ventura County Public Defender's Office, Leiderman had graduated from misdemeanors to murders and three-strike cases. He sought out a series of cases defending the homeless, successfully challenging an open-container law that was frequently used to round up Ventura's large indigent population and getting a raft of misdemeanor illegal camping charges — also used as a weapon against the homeless — thrown out so decisively it led to an internal city review. "It pissed me off, it was a horrific injustice, and it was the right thing to do," Leiderman said."

"Leiderman's years at the VCPDO coincided with the passage of California's medical marijuana statute, and the young lawyer started taking possession for sales and illegal cultivation cases. By the time he opened a private practice, in 2007, Leiderman had become something of an expert in state and county compliance laws. In addition to defending clients from marijuana-related criminal charges, Leiderman also advises medical marijuana collectives, teaching them the law, writing up their contracts and articles of association, and waiting on retainer for run-ins with the police." Leiderman co-authored a book on the legal defense of California medical marijuana crimes, which was published by NORML, the National Organization For the Reform of Marijuana Laws. Leiderman has "some pretty deep connections with Ventura County's medicinal cannabis community".

He was named to the top 100 criminal defense lawyers by the National Trial Lawyers. Leiderman was also featured in a video about his life and work on CNN's Great Big Story and appeared in the movie "The Hacker Wars." Leiderman was certified as a criminal law specialist by the California Board of Legal Specialization in 2006.

Leiderman graduated from the University of Michigan in 1993 and University of San Francisco School of Law in 1999. "He showed up for classes at the University of San Francisco Law School ... with hair halfway down his back, and left in 1999 as the class president. He applied to public defender jobs around the country, and picked Ventura because of the weather."

Jason Scott "Jay" Leiderman (born April 12, 1971) is an American criminal defense lawyer based in Ventura, California. The Atlantic Magazine called Leiderman the "Hacktivist's Advocate" for his work defending hacker-activists accused of computer crimes, or so-called "Hacktivism" especially people associated with Anonymous. Leiderman "keeps an encrypted chat app open at all times so he can dispense ad hoc pro bono legal advice to members of Anonymous" Buzzfeed called Leiderman "The Maserati-Driving Deadhead Lawyer Who Stands Between Hackers And Prison" and stated he was "A medical marijuana and criminal defense lawyer from Southern California [who] has made himself into the country's leading defender of hackers."