The state of Missouri has revoked the peace officer license of a former highway patrol trooper who was driving a patrol boat when a handcuffed man fell out and drowned.     A 20-year-old Iowa man fell out of a water patrol boat on the Lake of the Ozarks in 2014.      Witnesses said he was handcuffed and a wearing a life jacket that was not properly secured.     Now the Missouri Department of Public Safety has complet…