The practice of obtaining warrants with artificial but believable evidentiary basis to conceal the illicit means by which the basis was actually obtained is called "parallel construction", and the intentional practice or facilitation of it should be a felony with a maximum penalty of imprisonment of up to 50 years (2.5x evidence tampering, and I'd be fine with a mandatory minimum sentence of 10 years). It is a heinous perversion of the public trust, knowingly undertaken by unchecked law enforcement personnel to wilfully conceal unconstitutional acts. Parallel construction is a stain upon the very fabric of our nation... Or, you know, business as usual.

https://en.m.wikipedia.org/wiki/Parallel_construction