To clarify, 12 is not the cops, not the police. NO. 12 is the narcotics officers that show up at your door, or the drug task force in other words the DEA (Drug enforcement Administration). They combat drug smuggling use in the U.S. Aka why in the song fxck 12 by migos he says "throw that shxt throw that shxt 12 outside" refering to throwing the drugs because the DEA or 12 is about to kick the door down.
12 kickin in the front door