In September 1882, after the Earp Vendetta Ride, Behan had a feud with his own deputy, Billy Breakenridge. An investigation found that Behan had somehow set aside $5,000 in funds while he was sheriff from unknown sources. Due to public and legislative unhappiness with Behan's performance, he was last on the Democratic Party's list of nominees for sheriff, an unusual result for a seated sheriff. Behan failed to gain the nomination and thus left office at the end of his term, in November 1882.