Reasons enclosed in these threads:

https://bitcointalk.org/index.php?topic=5151566.msg51374061#msg51374061

Some good posts here that clarify his false accusation and he still leaves it up.

https://bitcointalk.org/index.php?topic=4981427.0

My message is beware of this guy, if you piss him off he will try to ruin you with fake smears. I wouldn't trust a word he says.