The heinous 2002 execution-style slayings of a Livonia, Mich., jeweler and his family provided federal agents a key informant in major crackdowns on two Detroit-area motorcycle gangs.
William "Billy Wadd" Smith, a former boss of the Devils Diciples bike club, was so horrified by the killings of the jeweler, his three children and their grandmother that he testified in state court against his own nephew, John Wolfenbarger, who was one of the shooters.