Unsure what to do

Again I find myself caught between friends... I had such a beautifully brilliant blog written about this already, but my blackberry decided to crash and burn moments before sending so this is gonna have to be the short version. Friend A, a new friend appears to have accused Friend C of impersonation to Friend B. This has led to Friend B making those accusations public without the slightest idea of what damage would ensue to Friend C's very public (and private) life. I cannot actually accuse friend A as I have no facts and unlike friend B would not dream of exacting unknown damage for the sake of a rumor. Lots of innocent people have been hurt- hacked, emotional distress from a PTSD-sufferer and an impressionable child as well as damage to reputation- when all Friend C wanted to do was help. Furthermore, no retraction, apology, removal of accusation nor attempt to reach out to Friend c has been made though Friend C has been working feverishly to contact Friend B and clear his reputation both. I do not wish to cause any further damage, but feel this great wrong needs to be righted. It casts dark shadows upon many friendships- current and future- and upon the stories and research Friend A typically appears to put into said stories. I know that someone is lying in this, but have no idea who. I don't know where to begin to help. I feel so lost and really wish people would take better consideration of the consequences they could cause by even the most seemingly simple words and actions. I feel we are all adults and these wrongs should not have to be pointed out. I am incredibly hurt because Friend C and yet another friend loosely involved are both two of incredibly few close friends that I have left standing and I fear so much... losing more especially. This last part seems selfish, but really, this is what keeps me from knowing what I could do, I feel. I don't know who to ask about things and who should I trust over who. I hate that I feel forced to choose. I don't know how to even approach certain people- especially those I know the least... and am desperately tired of this tangled web that has sprouted from my years of involvement with the ministry I know every single one of these friends from.