If he had explosive diarrhea, how could he “clean himself” with his undies? Wouldn’t they be the first thing to be soiled?
you should be lead detective.
This happened to me last month while visting Hawaii. We were driving back from the far side of the island after eating a rich dinner/dessert. I absolutely had to go (lactose intolerance maybe?), and there were no services for miles.
Long story short, I tried to hide in a sugarcane field, and used the technique illustrated above. It worked. Got 4 good wipes, which was good enough to get us back to the B&B. I thought I had hid myself pretty good until I got back to the car, and my wife had a horrified look on her face; she saw it all. Her comment to all my friends after the fact was "I guess now I know where BROWN sugar comes from!"
At least his soiled clothing will provide evidence that he did have that problem.