If we have to suffer these "Islamic" inadequates let's hope they keep playing with Acetone Peroxide. Interestingly enough, it's already accounted for a significant number of Palestinian bombers in "own goal" spectaculars.
If proven to be the preferred choice, or all that the Moslem terror groups in Leeds, Bradford or Tipton for example can get their hands on, all the better.
It is unstable, degrades with time albeit highly explosive as we have regrettably seen to our cost, but it tends to scare the bejesus out of those handling it (As evidenced by the fact that the "suicide" bombers are now chucking rucksacks onto trains and scarpering ?)
As for the "5 rounds" to the head, sub judice now of course although the speculation from the usual suspects will only give the terrorist the benefit of the doubt, never the policeman on the front line with milliseconds to act. I guess you have to be there at the time.
Sounds like a righteous shoot to me though and serves notice on the terrorists that the good guys have the initiative as long as the public are alert, the intel is good and the murderers are on the defensive now for the time being.