They can put a bug under the floor from a basement. They can hear everything you say. They could do that 40 yrs ago. Imagine what they have now. Best way not to get caught is to have guys who hate cops more then they fear going to jail. Plus if they are a life long friends from child hood just like a brother they just won't rat.

Any one else is a loose end. Lose a loose end buy another they work cheap and can be replaced easy.