No, evidence suggests that neither Aaron McKinney nor Russell Henderson, the perpetrators of Matthew Shepard's murder, were homosexual. While they did target Shepard because he was gay, there's no indication that they themselves were gay. The incident involved a robbery and a false claim of being gay to lure Shepard into the situation. Henderson even stated he had no animosity toward gays. McKinney's lawyer attempted a "gay panic" defense, but this was rejected by the judge