About Your Criminal Defense Attorneys

With five decades of criminal defense experience, our Bay Area-based Tully & Weiss criminal defense attorneys are essential for your best defense to have charges reduced, dropped entirely, or presenting an effective and powerful defense at trial.

Our legal team is active in their community, and frequently sought to speak at council meetings, seminars, and conferences. Tully Weiss attorneys have provided legal analysis for media outlets and cable channels such as the San Francisco Chronicle, Law & Crime TV, 60 Minutes, Rolling Stone, and talk radio stations.

Our office is located steps from the courthouse in Martinez, Contra Costa County and we represent clients in Santa Clara, Alameda, San Francisco Counties and throughout California in both State and Federal court.

Joseph Tully

Joseph Tully

Founding Partner, Criminal Law Specialist

Our founding attorney, Joseph Tully, is sought out for his expert legal advice throughout California. With over 20 years of experience as a criminal lawyer, in 1000+ felony and other cases, Tully served as felony trial counsel as a public defender before launching Tully & Weiss in 2001.

Joseph Tully is a Certified Criminal Law Specialist, an elite certification awarded to less than 1% of California lawyers by the California Board of Legal Specialization and Joseph Tully has been listed among National Trial Lawyers’ “Top 100 Trial Lawyers” multiple years.

Joseph Tully has an extraordinary record of victories in high profile cannabis trials from Redding to Contra Costa County and a precedent-setting win in a hotly contested Stand Your Ground murder trial. His diligence and meticulous preparation has resulted in scores of great outcomes for cases others declared impossible.

Joseph’s new non-fiction book, California: State of Collusion, reports on Tully’s first-hand observations of massive and frequent misconduct by law enforcement, prosecution, and government officials.

Ashley Bargenquast

Ashley Bargenquast

Criminal Defense and Cannabis Compliance Attorney

Ashley Bargenquast has been at Tully & Weiss Attorneys at Law since 2015 and is proud to be a member of such an amazing team. She practices both criminal defense and legal cannabis compliance. Her dual role has allowed her to work hands-on with the new industry regulations and take that knowledge into the courtroom where she has used it to defend cannabis patients and entrepreneurs alike. Her undergrad was at UC Davis, and her JD is from King Hall School of Law at UC Davis. When she isn’t in the court room or preparing applications at her desk, she can usually be found catching some live theatre or participating in a live action roleplay game.


Alan Kagawa

Associate Attorney

After graduating with a degree in Psychology from the University of California, Berkeley in 2012, Alan Kagawa spent a year working as an emergency medical technician. He then attended Whittier Law School and graduated magna cum laude in 2017. During law school, he was a senior staff editor on the Whittier Law Review, an articles editor on the Whittier Journal of Child and Family Advocacy, a member of the Moot Court Honors Board, and the secretary of the Trial Advocacy Honors Board. He joined Tully & Weiss in 2017 where he works on Criminal Law, Restraining Orders, and Criminal Record Expungement and Rehabilitation.