FILE - In this Sept. 30, 2008, file photo, Conrad Hilton, left, Kathy Hilton, center, and Rick Hilton arrive at the launch party of new MTV series "Paris Hilton's My New BFF" in Los Angeles. Federal prosecutors in Los Angeles say Paris Hilton's brother Conrad has agreed to plead guilty to assaulting flight attendants on a trip from London last year. The U.S. attorney's office says Hilton signed the agreement Tuesday, March 3, 2015. He's set to appear in court Thursday but will officially plead guilty to the misdemeanor later. (AP Photo/Matt Sayles, File)
Paris Hilton's youngest brother, Conrad, agreed to plead guilty to assaulting flight attendants on a trip from London to Los Angeles last year during which authorities say he called other passengers "peasants" and threatened to kill crew members.