A federal employee who filed a whistleblower complaint against the Elon Musk-led Department of Government Efficiency said his car’s brake lines were cut last year just hours after Musk publicly accused him of lying. The claim appears in a newly unsealed defamation lawsuit, filed on April 17, against the billionaire. The whistleblower, Dan Berulis, an IT staffer with the National Labor Relations Board, filed a whistleblower complaint with Congres…