An eyewitness said that a police officer had shouted to the man to stop "a couple of times", but he had not heeded the warning. (Source: Telegraph )
My point isn't that the police have intentionally made stuff up. If that's the case then they should answer for that. My point is if you are put into situations which are of extreme stress and all over in a few seconds then chances are you are not trying to remember things as they occur but dealing with the situation. In this case "Is he going to shoot? Yes/No."
Afterwards there is a certain fog of war where people, even trained police will be confused as to what happened. In that situation, it's totally feasible that information which is released/leaked too early is later proven to be wrong by facts.
So all I'm saying is that we shouldn't be too critical of the police, we need to make allowances for what the police thought was the situation at the time and give time for the official investigation to complete.
It's the same with Mendes. A tragic mistake. But bear in mind that the officers who shot him were told he was a suicide bomber with possibly a bomb on him. They were in the same carriage as him and probably shitting themselves that this "terrorist" could blow them all to kingdom come and they wouldn't make it home to their own kids that night. If that's what you were told and you were there, would you shoot? I probably would have.