Kris Kross star Chris 'mac Daddy' Kelly died from a drug overdose, a coroner has ruled. The rapper was pronounced dead at a hospital in Atlanta, Georgia on 1 May (13) after he was found unresponsive at his home in the city. An autopsy was carried out the next day (02May13) and now officials at the Fulton County Medical Examiner's Office in Atlanta, Georgia has ruled drugs as the official cause of death following the return of toxicology results. Kelly struggled with substance abuse for years, and reportedly used both cocaine and heroin on the eve of his passing. His death came three months after Kelly reunited with his Kriss Kross bandmate Chris 'Daddy Mac' Smith in February (13) for a special concert to mark the 20th anniversary of producer Jermaine Dupri's label So So Def Recordings, the company the duo was signed to at the height of their fame in the early 1990s.