I am not trained to read those wound charts, but it is confusing - “entry, re-entry, and exit” wounds are reference, but the diagram shows no wounds of any type on the rear torso. It seems the only way you could have both entry and exit wounds on the front of the torso would be if the person were in the process of falling forward as he was hit, and that one or more shots hit Brown when his body was more-or-less parallel to the ground, i.e., at something like a 90 degree angle to the officer.
The value of the diagram is to show no wounds in the back. Beyond that it is only a sketch lacking detail.