Ryan Kelly Chamberlain II is an American media and political consultant, who worked on the campaign of Gavin Newsom in his run for mayor of San Francisco. He was the subject of a nationwide FBI search beginning May 31, 2014, after evidence of explosives were reportedly found in his San Francisco apartment, and after he had allegedly posted a suicide note on Facebook. Details of the reasons for the manhunt were not immediately released by investigators. Chamberlain was arrested by the FBI in the evening on Monday June 2, 2014 within the San Francisco city limits. He was charged with possessing an illegal explosive device. Chamberlain allegedly had "four components necessary to comprise an IED" in his apartment, according to the FBI.