Tragic but his own fault.
A habitual criminal trying to break his downward cycle of life decides to return to his old ways and pull a stupid stunt involving a gas mask and a replica gun. Beejeezus, just as with the woman and the store owner he last pulled this one, if I had been a customer or the Ladbrokes' staff, I would be crapping myself.
He does not talk to his family or any mentor about this, his want to commit or whatever was driving him. He goes ahead and does it, intent on grabbing some dosh (£600 on his previous attack - and NOX, that was what it was, an attack - robbery - with arms).
If I had been in that shop or any branch and I saw an opportunity to jump someone like him, I would.....and I think most men would and I can think of a few women would as well. At least I hope I would, having been in some nasty situations as to rescues before.
And am I going to sit on him and say, "Hello, nice man, are you ok, are you breathing, oh we'll get off you so you can flay out and flee." Like bloody hell am I. He stays there until the police arrive and I am not going to take any chances with this turd at all - as he could end up injuring us.......
Yes it's a shame, but the question to ask is not about the people in the shop that evening or the police here - they have done the right thing. It is with the family and his social service support - and perhaps the prison system in "Could we have done more, why did he do this, what drove him to do it."
Or did he want to go down spectacularly?
The autopsy may reveal more. So we must also stop our speculation at this point.