Dental dam? I think they want absolutely no exchange of bodily fluids. But like what was hypothesized on LIB, it could be just a foot in the door thing. Use a Rubber Check to snoop around for drugs, U/A drinking, maybe check for warrants (that'd keep the suitcase pimps off set).
But really this probably boils down to election year grand standing. The politicians will use this and some other incidents to show the rich and the old how they are trying to clean up LA, and make it a safer place. Wait until around August/September and you will probably start to see a spike in BackPage busts.
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Thinking of cracked-out and/or tweaking whores getting their throats and asses brutalized for the next hit makes me hard. --Rear Admiral