WTF happened with the death of Gareth Williams?

[youtube=http://www.youtube.com/watch?v=yHr2OgnH9ik&w=600&h=315]

"Probably an accident" doesn't seem like the right description when your body is found padlocked in a duffel bag and, oh, you were a spy.  But that's the latest word from investigators.

There are numerous theories on what could have happened, most involving some kind of cover-up. Some believ…