A former Colorado county election official was found guilty Monday of tampering with voting machines following the 2020 presidential election.

A jury found former Mesa County Clerk Tina Peters, a Republican, guilty on seven of 10 counts of election interference.

Peters has become well-known among election deniers who falsely believe the 2020 presidential election was rigged to the detriment of former President Donald Trump.

Peters pleaded not guilty to all charges in 2022.

The case marks the first time a local election official has been prosecuted for an alleged security breach during the 2020 election.

“Tina Peters intentionally compromised her own election equipment to prove Trump’s big lie,” Colorado Secretary of State Jena Griswold said in a statement.

“Today’s ruling sends a clear message: we will not tolerate any efforts that threaten the security of our gold standard elections,” she added.

The jury deliberated for more than four hours on Monday before returning the verdict. Four of the seven charges on which Peters was found guilty are capital crimes.

The former county official was found guilty of three counts of attempted interference with a public official, one count of conspiracy to commit criminal impersonation, first-degree abuse of office, dereliction of duty and failure to comply with orders of the Secretary of State.

According to the indictment, prosecutors said Peters was involved in a “fraudulent scheme designed to influence public officials, violate security protocols, exceed permissible access to voting machines, and arrange for the disclosure of confidential information to unauthorized persons.”

Prosecutors said Peters helped break into the county’s election computer systems and gave an unauthorized person access to voting machines and election materials. The person posted secure images of the voting machines online.

Peters became “fixated” on election issues after the 2020 presidential election, some of which falsely believe were rigged to Trump’s disadvantage, prosecutors said.

Investigators also issued a search warrant in connection with Peters’ case against MyPillow founder Mike Lindell, who alleges election fraud, reported the BBC’s American partner, CBS News.

Peters’ sentencing is scheduled for October 3. Her lawyer could not be reached for comment.