Through the back of the neck and out the front.

She had been hit hard on the back of the neck.

Or better, like getting hit in the back of the neck.

He was then shot in the back of the neck.

He had been shot through the back of the neck.

These two had been shot in the back of the neck.

A shot in the back of the neck and the game is up.

Without thinking I shot him through the back of the neck.

One shot into the back of the neck is all you need.

He felt the hair at the back of his neck trying to stand up.