County Executive Officer Mike Callagy testified for several hours Wednesday in ongoing proceedings that could lead to the removal of San Mateo County Sheriff Christina Corpus, addressing allegations he undermined Corpus’ leadership and was involved in labor and personnel matters.

Corpus faces two simultaneous efforts to oust her: one under Measure A, a voter-approved initiative passed in March granting the Board of Supervisors authority to remove a sheriff through 2028, and another stemming from a civil grand jury accusation filed in June alleging misconduct and abuse of power. If removed, she would be the first elected sheriff in California ousted by a county board.

Callagy spent much of the eigth day of the hearings on the witness stand answering questions from Corpus’ attorneys about

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