Everyone's a Suspect Feat 20InvestigatorSource Advanced Player's Guide pg. 65
You are so suspicious of everyone you meet that you keep mental notes on how to defeat them all—even your own allies. After interacting with a creature for at least 1 minute, you automatically
Pursue a Lead with that creature as the subject. You can have any number of such leads at any given time, and when you Pursue a Lead again, you don't give up any of these automatic subjects.