The Bothun photo is of no use.
OK. The timestamp for the Bothun Photo is :30 seconds after the kill shot. Yet, we see Motorcycle Officer Hargis beginning to ride away. Considering everything that Hargis did, that :30 seems very quick for him to be riding away.
Also, that photo shows almost all of the Hargis motorcycle windshield. A detailed look at that windshield should reveal a lot of blood/brain matter on it. Hargis stopped his motorcycle quickly after the kill shot. Whatever was on that windshield should have remained "as is" on the Bothun Photo.