Mistakes happens, just, i was a bit disapointed to see the british police, usually so careful, behaving like that. Often when people die it is because they threat the policemen (very dangerous to do that in france).

and shooting a bomb is not really cleaver as well.

Neither will he detonate anything. If you shoot in a crowded enviroment like a subway, you shoot to kill. Nothing else is important enough to risk hitting bystanders. If you shoot to kill, you shoot until you are sure. A wounded suicide bomber will detonate, anything else is wishful thinking.

Well certainly not in France. Remember this:

A national outcry followed the shooting at point blank range by police of three unarmed young men in separate incidents in the pace of four days in April 1993. All three youths — Eric Simonte, Makome M’Bowole, and Rachid Ardjouni — died from their injuries. Two of them were minors. Makome M’Bowole, aged 17, was shot through the head during interrogation in a police station. After apologizing to their families, Minister of the Interior, Charles Pasqua, reminded the police that they were given arms to defend citizens, not to attack them.