I watched the re-enactment of the de Menezes killing (ITV1) last night. I don't know how accurate it was, I suppose much of it was based on police testimony to the inquest, so handle with care.
One thing became obvious; once the cops decide that you're their man everything you do is seen as confirming your guilt, nothing you do will shake that conviction. At one point J.C. got off his bus to enter a tube station. The station was closed because of the security alert, so J.C. walked away and got back on the bus to travel to the next station. "He's sussed us!" cried one observer. No need to look for another explanation.
The thing that really pissed me off about this programme was the amount of advertising that accompanied it, I estimated about 20 minutes in an hour. Diabolical! I don't often watch ITV1, like many others, so I wasn't prepared for the commercial overkill. Something else we have to thank the deregulators for.