A documentary that unwinds a mystery took the top prize at the International Documentary Association Awards on Dec. 7, 2012, in Los Angeles at the Director’s Guild of America. “SEARCHING FOR SUGAR MAN” beat out Ken Burns, Sarah Burns and David McMahon’s “CENTRAL PARK FIVE,” Kirby Dick’s “THE INVISIBLE WAR,” Lauren Greenfield’s “QUEEN OF VERSAILLES,” and Peter Gerdehag’s “WOMEN WITH COWS.” “SUGAR MAN” tracks down Rodriguez, a singer/songwriter who lived in Detroit before finding huge success in South Africa with his album “COLD FACT.” Rodriguez’s rumored suicide on stage attracted filmmaker Malik Bendlejelloul to the project.