What happens when you tell the cops that you've stumbled on a terror plot, a terror plot which will result in thousands upon thousands of deaths?

Nothing, that's what.

They don't believe you. They demand proof. They demand that you go back inside where the plot is being planned, where the mice are being killed, where the weapon is being readied to use against humans. That is where the proof is. That's where I might be seen, chased, killed.