Press Releases


San Francisco, CA – District Attorney Brooke Jenkins announced today that her office secured a conviction of Mark Holbrook (36) of Olympia, WA, after trial by jury for possession of a loaded firearm on the 5 Muni bus line.  He was convicted of possession of a firearm by a felon (PC 29800(a)(1)), carrying a concealed weapon (PC 25400(a)(2)), carrying a loaded firearm (PC 25850(a)), and possession of ammunition by a felon (PC 30305(a)(1)). 

“I would like to thank the jury for their service and the bus driver for his quick thinking and prompt call to police for help,” said District Attorney Brooke Jenkins.  “Guns don’t belong in the hands of convicted felons at any time in any place, but especially on public transit.  San Francisco residents expect and deserve a safe public transit system.  We will do everything in our power to ensure there are consequences when people seek to exploit our public transit system, endangering the lives of others.”

According to testimony and other evidence presented at trial, Mr. Holbrook was seen to be in possession of a firearm at approximately 2:05AM on October 15, 2022.  The bus driver who saw the gun got off and called San Francisco Police who responded to the scene and detained Mr. Holbrook who confirmed he was in possession of a ghost gun that was loaded and additional ammunition. 

The case against Mr. Holbrook was successfully prosecuted by Assistant District Attorney Anupa George with assistance from District Attorney Investigators Lissette Souza and Preston Lee, several paralegals and trainees including Jen Java, Thao Phan, Sara Wong, Maite Kvarna and intern Daniela Duarte.  Prosecutors were able to develop a strong case against Mr. Holbrook with cooperation from the San Francisco Municipal Transportation Agency and careful investigation by the San Francisco Police Department. 

Mr. Holbrook is currently in custody pending sentencing.  He faces three years and eight months in State Prison.  Sentencing is scheduled for September 20, 2023.

Court Number: 22012240