Shooter's possible ties to Orlando gay scene raise questions

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Was the Orlando nightclub gunman part of the local gay dating scene? As investigators ask that question, activists and academics reflect on a phenomenon that has been documented: Some men who profess to disdain homosexuality have covertly engaged in sex with other men.

Over the years, there's been a string of politicians and pastors who publicly opposed gay-rights initiatives, and eventually were implicated in furtive same-sex liaisons.

It's not yet known if Omar Mateen, killed in a gun battle with police during Sunday's attack on a gay nightclub, had any internal struggles related to sexual identity.

His father suggests he may have acted out of anti-gay hatred, and wasn't gay himself. The FBI is investigating reports that Mateen was a regular at the nightclub and used gay dating apps.