I think you are on the right trail for sure. People on here who defend KR often point to the DNA evidence, which is of course important, but they treat it as ABSOLUTE. If LE is carefully watching and building a case on KR, are they really going to say "The killer's DNA was found on the pen and bag, oh and also we found KR's on the pen and bag too". No, of course not. They are only giving the public enough info to say " we gave them info", and any person of interest or evidence pertaining to that person is naturally being left out. Think about the pen for a moment. Would a killer bring his own pen to the murder and leave it there? I'm sure it was a pen one of the girls used for class. So in all likelihood the pen has at least the same DNA as the person who left their semen and either KR or FH's, perhaps both.
My theory is, KR was there and may have even participated in the beating. As to who raped and delivered the death blow with the bottle, I think it could be a relative of KR. People wonder how a secret could be kept for 5 years? Friends get sold down the river, whereas blood is thicker than water.
Why I don't believe in the random act of violence by a drifter or person not connected in some way to any of the key suspects- Chief Blue said, when asked on 20/20 what he thought is the percentage of likelihood the case would be solved said, without a flinch, "100%". This could be police posturing like, well of course we will solve this case for this poor family after all this time, but I don't think that's it. If they genuinely had no clue who did this, they'd be more open with the public on the info they have and make a broader appeal for help. The fact they have been mainly tight lipped to me is very telling.
