DENVER — Disgraced evangelical leader Ted Haggard’s former church has disclosed that the gay sex scandal that caused his downfall extends to a young male church volunteer who reported having a sexual relationship with Haggard.

The disclosure comes as Haggard, 52, is about to give a series of high-profile interviews to promote an HBO documentary about his time in exile.

Brady Boyd, who succeeded Haggard as pastor of the 10,000-member New Life Church in Colo-rado Springs, said the man came forward in late 2006 shortly after a Denver male prostitute claimed to have had a three-year cash-for-sex relationship with Haggard. Boyd said he was certain the man was of legal age when it began.