It's why the MSM is dying. The real point, no matter whose bullet hit home to stop the madness, was that it was done by Americans - against a traitorous Islamic jihadist. Four bullets hit him in the chest - unfortunately, none hit him between the eyes.
Under stress head shots are very difficult to do. Center of mass is better as you lose fine motor control as the adrenaline and stress peak. your vision also narrows and periphery tends to go away.
That said it would have been an awesome and welcome accomplishment if they would have been able to do that.