Former Titans quarterback Steve McNair has been killed, a source has confirmed to ESPN.com. McNair, 36, suffered a fatal gunshot wound to the head in downtown Nashville, police spokesperson Don Aaron said. A female victim was also found dead. Aaron said the woman has not been identified, pending notification of next of kin. McNair played 13 seasons in the NFL, 11 were with the Titans. He played his final two years with the Ravens, retiring after the 2007 season.