Gromit
Whatever the rights or wrongs in that particular case, I can tell you that he was shot eight times at close range in order to destroy the brain.
Without going into too much detail, I was taught to imagine a crosshair above the persons eyes in the middle of the fore head, then above each ear, back of the head and then imagine the head in four sections and shoot into each section, thus destroying any chance that the terrorist could detonate the bomb. This procedure was also carried out by the SAS in Gibraltar when they killed some IRA bombers in the 1980's
Thankfully I never had occasion to do this