Frank is a longtime Ohio math and science teacher who claims to have discovered secret algorithms used to rig the 2020 election and has done work for Lindell. In a Telegram post shortly after midnight, he said two FBI agents met him as he was getting off a plane. “They had a warrant to seize my phone,” wrote Frank, who did not identify the airport. Asked for his account, the FBI’s Denver field office acknowledged that a court-approved warrant was served, but did not provide details. Lindell said Tuesday that FBI agents served him a warrant and questioned him about Tina Peters. A Mesa County, Colo., employee was indicted in March on state charges that he helped an outsider copy sensitive data from the county’s election systems in May 2021. Peters has pleaded not guilty. The Mesa County investigation is one of multiple investigations into alleged security breaches at local election offices in states that also include Michigan and Georgia. The alleged breaches, in some cases with the help of like-minded local officials, were aimed at finding evidence that the machines were used to rig the election. Search warrant documents Lindell presented during his webcast Tuesday afternoon said federal investigators were looking for evidence of possible violations by Lindell, Peters and several others — including Frank — of federal laws against identity theft and intentionally damaging a protected computer. Frank met with Peters in her office in April 2021 and “showed her how her election was rigged,” Frank previously told The Post. She said she was told that an upcoming Dominion software update could erase the data needed to show the election was stolen, and relayed to someone in Lindell’s circle her request for technical assistance to copy that data. Prosecutors accused Peters of participating in a scheme that allowed Conan Hayes, a former professional surfer and purported data expert, to access Mesa County election systems and copy sensitive records in May 2021. Peters allegedly helped arranging Hayes’ access to the building with a badge assigned to another person. Hayes has not been charged. “I didn’t do anything illegal,” Frank told the Post via text message Wednesday morning in response to an inquiry about the warrant served on Lindell. He did not immediately respond to questions sent by text and cable Thursday. The Post reported last year that Frank has been traveling the country trying to get local and state officials to join the effort to uncover alleged voter fraud. In that time, Frank said he had visited more than 30 states and met with 100 election administrators. Lindell acknowledged at the time that he had hired Frank for several projects, but said he was not aware of all of Frank’s activities. Lindell has said repeatedly this week that he had nothing to do with the copying of sensitive election files in Mesa County and didn’t meet with Peters until months later, when she came to a “cyber symposium” event held in South Dakota to air allegations . of fraud.