What is Truth?

I don't know what to think now. After reading The Laramie Project and watching several news clips on the same event, I don't know what to believe. After reading The Laramie Project, I was completely convinced that Matthew Shepard was killed because he was gay. I wholeheartedly believed it was a hate crime. I didn't think anything was going to change my mind about it until I watched the 20/20 special on Matthew Shepard. Six years after Matthew Shepard passed away the 20/20 Special Report was aired and the public got to see Aaron McKinny and Russell Henderson and hear their side of the story. They confessed to being on Meth and were tweaking. They hadn't slept in almost a week and were on the drugs. Drugs is always a compelling motive but was that what happened?
In the interviews, McKinny and Henderson both seemed genuinely sorry about what they did. Henderson especially. He says he never actually attacked Matthew but did tie him to the fence. I believe him. His body language was calm and he seemed defeated when he was talking to the interviewer. When someone is lying they look defensive and either lean back or get aggressive. Henderson didn't do either. This in no way excuses him of what happened that night. He was still there and saw McKinny beat Matthew to the brink of death. He still never called for helped. He did try to stop McKinny. I saw the scar that he got from McKinny hitting him in the face when he tried to stop McKinny. There is still the question of why. Why did McKinny do this?
I don't believe that Aaron McKinny approved of gays. I don't know if he hated them so much that he would target and beat Matthew to death but I don't think he liked gays. There was a claim that Doc and McKinny's girlfriend made about him being bi. If that is true, McKinny would rather die than admit it. He doesn't want to be seen as gay. There was never a drug test done on McKinny or Henderson so we may never know if they were high when they attacked but I think drugs definitely played a role in it. Drugs and Meth in particular can take away a persons better judgement and make them do terrible things. I still don't know what to believe but I think Meth played a bigger part in the crime than Matthew being gay.