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San Mateo, CA Police Department
Friday July 22nd, 2022 :: 01:13 p.m. PDT


Search Warrants Yield Stolen Firearm and Illegal Assault Rifle

For Immediate Release No. 20220722-034
Friday, July 22, 2022

Search Warrants Yield Stolen Firearm and Illegal Assault Rifle

A search of a San Mateo residence located a stolen firearm, illegal rifle, and ammunition

San Mateo, CA – Over the last several months, the San Mateo Police Department meticulously gathered evidence and learned that gang member, Alan Ayala, was committing the crime of being a felon in possession of a firearm.  SMPD officers learned Ayala had one residence in Burlingame and another in San Mateo. The officers obtained search warrants for both locations. 

On July 21, 2022, with the assistance of outside law enforcement agencies, SMPD executed search warrants at the 800 block of Rolison Road in Burlingame and the 1000 block of Folkstone Avenue in San Mateo.  During the search of the Folkstone Avenue location, officers collected: a short barreled AR rifle with a “swift link” conversion device, which coverts it to a machine gun, a loaded .45 caliber Sig Sauer 1911 handgun with 7 rounds of ammunition, an AR-15 rifle, a loaded 60 round .556 magazine, a loaded 30 round .556 magazine, and a multiple items of gang paraphernalia. Later, SMPD learned the Sig Sauer was a reported stolen firearm. A cellphone was located and collected as evidence at the Rolison location. 

At the time SMPD executed the search warrants, Ayala was in custody for a probation violation. He was rebooked on the additional charges of possession of a machine gun, possession of an assault weapon, possession of a short-barreled rifle, felon in possession of ammunition, felon in possession of a firearm, and receiving stolen property. 

Gang membership plagues this entire country, and San Mateo is not immune.  Although our city may not experience the level of gang activities as other cities, our officers regularly engage street gang members and attempt to disrupt their crimes to keep San Mateo safe.  A balance of prevention, intervention, and suppression strategies are important for success in any community.  The San Mateo Police Department understands that children must be engaged to stay out of trouble.  Our Police Activities League (PAL) engages youth through programs such as juvenile diversion, police explorers, and several enrichment programs. Please visit for additional information and learn how you can partner with San Mateo Police Activities League to keep our kids on track in school and out of jail. 

Alan Ayala, a 28-year-old Burlingame resident
Charges: Possession of a machine gun (32625(a) PC), Possession of an assault weapon (30515(a)(1) PC), Possession of a short barreled rifle (30515(a)(3) PC), Felon in Possession of Ammunition (30305(a)(1) PC), Felon in Possession of a Firearm (29800(a)(1) PC), Receiving Stolen Property (496(a) PC)

Alison Gilmore
Public Information Officer | Office of the Chief
City of San Mateo Police Department
200 Franklin Pkwy, San Mateo, CA 94403
650-522-7626 | [email protected]

San Mateo, CA Police Department
200 Franklin Pkwy
San Mateo, CA 94403

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Non-emergencies: 650-522-7700

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