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A Tiburon police sergeant was found dead at the department’s headquarters of an apparently self-inflicted gunshot wound, the agency said Tuesday.

“We are extraordinarily sad to report the loss of Sgt. Sean Christopher,” police Chief Ryan Monaghan said in a prepared statement.

The shooting happened Monday afternoon.

“Out of respect for Sgt. Christopher’s family and coworkers as well as the investigation being led by the Marin County Sheriff’s Office, we cannot make any additional comments at this time,” Monaghan wrote.

Christopher was born in Sacramento and lived in Novato by the time he joined the Tiburon Police Department in February 2019, according to town records. He had worked as a Marin County sheriff’s deputy beginning in 2009, and the Sacramento County Sheriff’s Office before that.

Then-Tiburon chief Michael Cronin said at the time that Christopher had developed a reputation as an “accomplished training officer and defensive tactics instructor,” according to town records.

Christopher was promoted to sergeant in October, according to a department social media post. He was the department’s end-of-the-week, night-shift supervisor.

The sheriff’s office declined to comment on the investigation into Christopher’s death.

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