Okay, I checked your homepage - - you're one of those anti-WOD warriors? A liberaltarian? "Uh, right, sir. Well, listen.... even though your girlfriend here says you're a cokehead and there's kids and drugs in the house, we'll go get a warrant and come back later. Just leave everything as it is, okay?"
Why would they have to leave? Leave one officer to make sure that no evidence leaves the residence, and that no harm comes to mother or children, while a warrant is obtained. If he's a cokehead, no way he can clean the place of all residue.