...His presence was formidable, even intimidating: The former bodyguard had a muscular, 6-foot-4 frame, but it was topped by the brightest of megawatt smiles... Duncan died at Cedars-Sinai Medical Center in Los Angeles, where he was being treated for a heart attack, said his fiancée, reality TV personality Rev. Omarosa Manigault, in a statement released by publicist Joy Fehily.