2 San Francisco police officers, 1 former officer arrested in 2 separate incidents, sheriff announces

In August 2021, officials from the SFPD Property Division were conducting an inventory when they noticed a gun was missing. At that time, the SFPD was in the process of preparing 22 Heckler & Koch MP5 submachine guns to destroy.

The SFPD opened an investigation, which resulted in the termination and arrest of retired San Francisco Police Officer Mark Williams. Williams is said to have confessed to having a weapon at his home in Napa.
Williams is working part-time for the SFPD under the city’s Measure F program, which allows retired employees to work limited hours to help meet staffing shortages.

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He voluntarily surrendered at the San Francisco County Jail, where he was charged with unlawful possession of a machine gun, possession of a silencer, and embezzlement.

In a separate incident, Officer Kevin Lyons and Officer Kevin Sien were arrested in connection with an evidence destruction incident at the 700 block of Mission Street on July 2, 2021.

According to court documents, San Francisco Marriott Marquis employees were searching for missing hotel property in a guest’s luggage left locked in his room for non-payment when they discovered several credit card, ID and suspected methamphetamine.

When police were called to report suspected criminal activity, Lyons and Sien told staff that cataloging the evidence would take too long. The documents say that instead of collecting the items, the two employees threw their credit cards and identification documents in a trash can and dumped the drugs down the hotel restroom.

Both officers were assigned to the Tenderloin Police Department at the time of the incident. Lyons, a 21-year veteran, and Sien, a five-year veteran, were transferred to missions without public contact.

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On April 15, 2022, an arrest warrant was issued for both officers and they voluntarily surrendered. Lyons was cited and released on two counts of destroying or concealing evidence. Sien was cited and released on one count of destroying or concealing evidence.

“The actions of these members of the SFPD violate the law and unfortunately it falls short of the shared values ​​of our department,” said Sheriff William Scott.

All three arrangements are set for May 19, 2022.

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