Well the shooter did open fire. And a still standing live target isn't much different than a paper target with a 12 x 18 inch hit zone, and anyone can do that with a decent rifle and just a little bit of training (I often teach people to shoot my .223 Daewoo and have never failed to have a non shooter consistantly hitting milk jugs at 125 yards in less than 20 shots with open sights). I'm assuming that the shooter would pick out the easiest to hit targets, not people jogging or running their dog.
Shooting at paper targets is one thing.
Calmly (physical and mental calmness is necessary for good shooting) transcending the oldest of man's prohibitions is something else entirely.