Alright, since we're back to KR again:
The issue of semen being present and matching the DNA of the murder weapon continues to be an insurmountable problem in the "KR did it in a rage" scenario. There has yet to be a realistic answer to that problem presented.
Second, and I don't think this has been mentioned before, but the motive (jealousy) in the KR theories is particularly half-baked. There's no evidence of conflict between the two women. None. The only named male the two had any sort of mutual relationship with was BE, and KR had a prior relationship with him while FH had a current plutonic one. That's as far as it gets. Even if there was a jealousy issue there, which again has never been shown, just supposed, female friends usually find a way to deal with that problem without deciding to "eliminate the hypotenuse". Even throwing a little alcohol into a jealous girl doesn't often turn her into a murdering sociopath. I knew girls in college that occasionally had conflicts over guys they both liked, and that usually just involved not speaking to each other for a while, making catty comments to friends, then tearily reconnecting once they realized their friendship was more important.
Now, sorry, but there is a "chance" Faith let an unexpected male in. It's been stated several times just in this thread by women that they did that very thing during their college years. It may seem unlikely, but Faith could have, too.
Finally, I hate to repeat, but LE looked at KR extensively. If she'd snapped and beaten Faith with a bottle, she'd have descended into a drunken panic, ran around leaving a bunch of incriminating forensic evidence, probably taken Faith's car as opposed to waiting for someone to come get her, then broken down after the first two hours of interrogation once she realized how hopelessly screwed she was.