That is kind of like saying you saw two guys walk into a closed room with one guy holding a gun, heard a gunshot and saw the guy with the gun walk out and then assumed the dead guy in the room killed himself. Could happen but not likely. The circumstantial evident is pretty strong he was murdered.
Apples and oranges argument. More like witnessing a shooting and closing your eyes and covering your ears to believe it never happened.
Where is your proof?