San Mateo County Assistant Sheriff Matthew Fox resigned Friday in the wake of calls for Sheriff Christina Corpus to step down, the deputies union confirmed.
Fox was just promoted to the role in September, the union said.
The sheriff said in a statement she thanks Fox for his service. Corpus did not respond to NBC Bay Area's request on Friday for an interview.
Corpus refuses to step down and stood her ground during a Wednesday special meeting in which the Board of Supervisors unanimously approved a call for the sheriff to resign.
Earlier this week, the county released a 400-page report on the findings of an independent investigation by retired Judge Ladoris Cordell that included what Cordell says is evidence of abuse by the sheriff's office and staff. The report details accusations that range from employee retaliation to overstepping authority. It goes on to allege lies, secrecy, and intimidation by the sheriff's administration.
Additionally, the report alleges that Corpus and her Chief of Staff, Victor Aenlle, are involved in a personal relationship.
Supervisors at Wednesday's meeting were on the verge of removing Aenlle's position when the sheriff promoted him to a position county leaders apparently do not control.
Cordell's report has been forwarded by supervisors to the district attorney, attorney general, and civil grand jury. Supervisors next week will consider an amendment that would allow the board to remove the sheriff under certain conditions.
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"So when we hear about more dysfunction and more people leaving the department, my mind specifically goes there first, and certainly on the minds of our county executive team, is how can we in the middle of all this dysfunction stabilize important public health and safety services to our residents," San Mateo County District 3 Supervisor Ray Mueller said.
Fox, a 25-year law enforcement veteran, most recently served as captain overseeing the Sheriff’s Office’s Community Engagement Unit and Headquarters Patrol Bureau. Before joining the sheriff's office in 2023, he was with the Daly City Police Department, according to his biography on the San Mateo County sheriff's website.
