Putting a little cold science on the table... While I do not doubt the coroners ability, but has he ever seen wound channel of a 9mm at close range vs .223 at close range in a child? Then to the police, I am interested in what spent brass was found on the scene.

Unfortunately, the media reports what it is told, and I am not putting on a tinfoil hat yet, but when the initial reports indicated handguns, not sure how you confuse hand gun to rifle.