I think fingerprints are super quick in this day and age.
We have to remember that he is well known in that neck of the woods...I'll bet he was recognized right away by a cop or maybe even the coroner.
Well, the company he currently worked for is into a lot of biotech stuff - he could have had any number of valuable documents in the briefcase. Some chatter in the blogosphere is really ‘out there’ with various theories on that subject.
If they targeted him for something like what was in the briefcase, they could have taken his wallet just to make it look like the usual mugging. He seemed to have been pushed to the ground hence the dirty pant knees and cuffs on his shirt and the damaged shoe. I wonder where that wound up?
I agree that it’s too far fetched to be a coincidence that all of this just happened to him in the matter of 3 days accidentally. The smoke bombs and whoever fingered him on those is just a smoke screen, I think.