Not quite an incidental finding, and scene story rather than autopsy, but a situation that turned out to have a medical cause that didn’t seem to at first glance. At first it seemed like a self inflicted gsw: blood everywhere, discharged weapon by hand, older guy who lived alone in not great conditions, etc, but we couldn’t find a gsw, there were three bullet holes in the opposite wall, and as we looked around more and traced the blood we pieced together a crazy story. Turned out, this guy had a severe ulcer from lymphoma in his armpit that was so huge by that point it extended halfway down his upper arm. He somehow ripped it open on the bathroom door handle and it bled like crazy. His phone was all the way in the kitchen, but he kept the gun in his bedroom, so he grabbed it while presumably trying to get to his phone and made it out into the living room before falling from blood loss. He presumably shot the wall in the hopes that a neighbor would hear and call the police, but he bled out before they did. Pretty resourceful if you ask me, not many people would have been able to keep that level of a head while literally pouring blood out of their armpit.