Whatever else happens, I ask pevergreen to prove he's a detective by investigating The_Stranger and Motep. We'll first execute The_Stranger, then Motep, and by the 3rd day the autopsy for The_Stranger should be available and we can judge the authenticity of pevergreen's claim. If either autopsy does not match pevergreen's claimed results, pevergreen goes on the 3rd day.

Vote on whom pevergreen should investigate in the usual way.

Spoiler Alert, click show to read: 
The_Stranger, Motep -1 (Pannonian)