Early this morning, HL2arena.com posted a chat implicating a man named William H Valentine, aka Hitman, a former member of the myg0t clan, for the distribution and/or theft of the HL2 source code. myg0t is known for releasing cheats for multiplayer mods of Half Life. Here's a snippet of the chat log:
SourceX: 1) Hitman, as I stated in the thread on the RC forums, was kicked from myg0t due to his illegal activities involving the distribution of pirated software and films
SourceX: hence, his email to VALVe, and my being blamed for releasing the source code
SourceX: much of the HL2 source code's wide spread distribution has been caused by Hitman aka hitman8
(SourceX not the real name)
Seems the blame game is going around and around at myg0t. I've attached an original copy of the full chat within this article, including Hitman's proported contact information, as posted by "SourceX."