How do you expect me to tell you how something DIDN'T happen? That's not possible.
What's possible is you actually building your case, as to what you think did happen. If you manage to step outside the pinko swarm mentality for a moment and actually articulate thoughts for yourself rather than simply re-hashing the entire contextual "words for their effect" thing.
Alright then, somebody got wind of the SD deal before it was announced, along with the price and bought up all shares below that price. MPEX is one of the places where the information could have been available beforehand. This makes you a potential suspect.