Search warrants.

[Karakuts]

Well it's not exactly easy for the police to find weed farms/meth labs/money printing operations in real life, they rarely come up. You can't just search somebody's house because they might have contra, and you shouldn't sit around somebody's house listening out for it. If I see or hear some while I'm on a patrol, I'll deal with it, but I don't specifically look for it, as hardly any evidence would come up.