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San Mateo County Board Clears Executive of Misconduct Allegations by Sheriff

An independent investigation found no merit in Sheriff Christina Corpus's claims against County Executive Mike Callagy, as the Board of Supervisors moves to close the matter.

San Mateo County Executive Mike Callagy, left, and San Mateo County Attorney John Nibbelin, right, at a special Board of Supervisors meeting on Thursday, May 22. Photo by Arden Margulis.
San Mateo County’s Board of Supervisors. (May 22, 2025)
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Overview

  • The San Mateo County Board of Supervisors unanimously voted to release an independent investigation report clearing County Executive Mike Callagy of misconduct allegations made by Sheriff Christina Corpus.
  • The investigation, conducted by Oppenheimer Investigations Group LLP, found no evidence to support Corpus's claims of discrimination, retaliation, and abuse of power by Callagy.
  • The report addressed accusations including Callagy's alleged inquiry into Corpus's personal relationships and interference in personnel decisions, determining these claims were unsubstantiated.
  • The Board formally declared Corpus's complaint closed, signaling no further action will be taken on the matter.
  • This development follows months of escalating tensions, legal disputes, and governance reforms, including the passage of Measure A allowing the Board to remove the sheriff by supermajority vote.