100%. It's like Lenin said, you look for the person who will benefit… and, uh, uh, you know… You know, you'll uh, uh—well, you know what I'm trying to say…

I’m not sure what you’re referencing, but the principal goes back way back to the Romans: Cui bono? [0]

0: https://en.wikipedia.org/wiki/Cui_bono%3F

It's a valid way to look for probable cause but it's important differ "you know" and "you assume" - I'm all for accountability but most conspiracy theories thrive exactly because of that sort of framing.

As to Lenin: The mouse died because it didn't understand why the cheese was free