Contra Costa County Office of the Sheriff detectives and deputy sheriffs, plus agents from the California Department of Justice, seized numerous weapons – including an assault weapon – weapon parts, ammunition and drugs during the serving of a search warrant in Brentwood on March 28.

Following an ongoing investigation by the two agencies, the Office of the Sheriff and Department of Justice served the search warrant at a residence on the 100 block of Trent Place and arrested 33-year-old Brentwood resident Marquis Smith, who was booked into the Martinez Detention Facility on multiple felony weapons and drug charges. He is being held in lieu of $870,000 bail.

The arrest and seizure was a result of an investigation by CASE (Criminal Anti-violence Support Effort), a joint effort by the Office of the Sheriff and California Department of Justice. CASE was created in November of 2011 as a collaborative effort to reduce violent crimes in Contra Costa, especially those related to illegal firearms.