I still stick by my post yesterday. God yes, it's absolutely tragic that this man was killed when he was not a suicide bomber. Yes, there must be an enquiry at all levels to find out what went wrong and ensure, as far as is possible, that such a terrible mistake does not happen again.
But we expect the Police to make quick decisions. Life or death decisions. We will never know why he ran - it's quite possible, as many people have suggested, that he didn't believe/realise they were armed Police, and was fleeing in terror. But the Police can't spend time deliberating on the ground about well, maybe he doesn't speak English, do you think he knows we're police, maybe we should get changed into uniform, what if he's deaf, what if he's not a terrorist but has some other criminal reason to run - they have to make a decision and they have to make it immediately.
My head is hurting at all the what ifs flying around but the top and bottom of it is the Police did not know why he didn't stop and had to assume the worst.
I hope the enquiry will produce more answers - particularly why they didn't stop him long before he got to the Tube, and why they let him get on a bus (if he did get on a bus, I read contradictory posts on that).
I don't know what the answers are. Lots of questions though