Seth says that the victim was shot in the occipital bone, which is at the back of the head. The victim's wound is in the temporal bone.
When the question of Colorblindness comes up, stating the Colorblind person could not tell the distinction red from green, this is inaccurate. A Colorblind person cannot tell shades of a certain color such as red, blue or green. A Colorblind person can tell two distinctive colors apart from each other.