The D O J Report Says It Was an Intra Oral Shotgun Wreck of the Head

The d o j report says the soot on billy joe's tongue is one reason why they think the gun was inside his mouth. This did not have the typical appearance of an intra oral shotgun wound at all. I don't agree with their interpretation. So we were trying to figure out what, why this discrepancy? Like, how could two different ptoters look at same thing and come up with completely different sarlusion?