Or maybe they are both right and GZ had a hold on the bottom of Martins hoodie pulling it out and shot causing the hoodie and sweatshirt underneath to be away from the body but close to the gun as TorisMom suggested in the above post.
Or . . . both sweatshirt and hoodie were very large, and both were away from the body because of gravity--meaning TM was over GZ. Because of gravity, there was a gap between the shirts and TM.