I mean, it's not clear that you're the one making mistakes.

As a player the information on who the "villain" is is already out there so it's entirely possible that my metaknowledge is biasing me subconsciously.

And honestly, the "official story" isn't that bad. If it has been a case of "he had a hidden kunai on him that didn't turn up on the search" or "he grabbed a kunai from one of the Hokage's escorts" Senko wouldn't have had so much reason to be suspicious.