Adead body and a gun were found in a small room. the room was empty except for a small desk and a chair. the room had two windows, a closet, and a door leading to the hallway. the crime-scene sketch artist measured the perimeter of the room and drew the walls to scale. he sketched the approximate position of the dead body and the gun. he sketched the approximate location of the chair and the desk. what did he forget to do?