Riverside County Sheriff Chad Bianco suspends election fraud probe as legal challenges mount

Grace Toohey, Los Angeles Times on Mar 30, 2026

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LOS ANGELES — Riverside County Sheriff Chad Bianco, a leading Republican candidate for governor, said Monday that he had paused his controversial investigation into unsubstantiated claims of election fraud, a probe that was facing mounting legal challenges and ethical concerns.

In a statement Monday, Bianco said the probe was "on hold" because of "politically motivated lawsuits and court filings."

It was a major reversal for the outspoken Trump supporter, who had defended the investigation — and broadened its scope — just last week. Bianco's employees have seized more than 650,000 ballots cast in Riverside County during November's election.

Bianco's attorney, Robert Tyler, said the sheriff had decided to wait for the courts to weigh in on the case before proceeding with the investigation or potentially terminating it, as California Atty. Gen. Rob Bonta has requested. Tyler said they were not conceding "that the attorney general has the ability to step in and stop a lawful investigation," but said the case had brought up complex legal issues, such as competing authority between the executive and legal branches, that need to be addressed.

"It's all in the hands of the court," Tyler said Monday. "Is the court going to allow this big question to be buried?"

Since it kicked off, Bianco's investigation has drawn widespread concern from election watchdogs and state law enforcement officials, including Bonta. The state's top attorney directed the sheriff to halt his investigation, and has since filed a series of legal challenges asking for judicial intervention to ensure that Bianco does so.

In a state Supreme Court petition filed Friday, Bonta called the case an "unprecedented constitutional emergency" and called on the court to order an immediate stay on Bianco's investigation.

A spokesperson for the attorney general's office on Monday acknowledged that Bianco said he would stop the probe — but said the office remained focused on "what the sheriff does, not what he says."

"We're continuing to proceed in the California Supreme Court and Riverside [County] Superior Court to secure compliance with our directives and the return of these ballots" to the Riverside County registrar of voters, the spokesperson said in a statement.

In his lawsuit, Bonta argued that Bianco failed to identify a specific crime in the warrants to justify seizing the ballots. The suit also alleges that "the sheriff's misguided investigation threatens to sow distrust and jeopardize public confidence in the upcoming primary and general elections, not just in Riverside County but around the state."

But Bianco previously pointed out that his department received warrants "approved and signed by a judge" to seize the election materials. The warrants remain under seal, though the attorney general said he has reviewed them.

Bianco has described the investigation as necessary "to determine the validity of the allegations of election fraud" that were raised by a local citizens group that did its own audit. The group claimed the county's tally was falsely inflated by more than 45,000 votes. County elections officials have emphatically rejected those claims.

The ballots in question are from the November election for Proposition 50, which has temporarily redrawn the state's congressional districts to favor Democrats in response to partisan redistricting in Republican states, including Texas.

The UCLA Voting Rights Project has filed a petition to the California Supreme Court arguing that all ballots must remain in the custody of the county registrar of voters under state law.

Bonta has also raised privacy concerns about the ballots leaving the custody of the registrar of voters, saying that the vote-by-mail ballots "contain confidential information, particularly voter signatures, and are strictly protected from disclosure by California law."

But Tyler, Bianco's attorney, continued to call the investigation warranted, given "credible evidence" of election fraud.

"Transparency is the best way to resolve confusion," he said. "Why in the world is the attorney general ... trying so hard to shut this investigation down?"

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(Los Angeles Times staff writer Hailey Branson-Potts contributed to this report.)