EXCLUSIVEThe FBI DID investigate sexual assault claims by the man who is now accusing "X-Men" director Bryan Singer of sexually molesting him in 1998 ... but he NEVER mentioned Singer ... this according to multiple sources close to the investigation.
Michael Egan and his lawyer both said at a news conference Singer sexually abused him at a pool party in Encino, CA. when he was only 15. Egan also claims 3 other men abused him at the party. He sued the 3 men in 2000 but Singer was never named or mentioned.
Egan claims he and his mom complained to the FBI in 2000 but the investigation went nowhere.
Our sources close to that investigation tell us ... the FBI fully investigated Egan's claims and the agency's investigation was instrumental in criminal charges of sexual assault of one of the 3 men -- Marc Collins-Rector -- but Egan NEVER mentioned Singer and his name never came up during the probe.
An FBI spokesperson tells us, "The FBI takes seriously allegations involving the sexual abuse of minors. The suggestion the FBI ignored evidence concerning the sexual victimization of a minor is completely without merit."