Cops did NOT snag the drug dealer who was allegedly selling dangerous heroin to Philip Seymour Hoffman ... sources tell TMZ.
We know the informant -- who armed cops with the info they needed to get a search warrant -- claimed Hoffman had 2 principal heroin suppliers. We're told the informant said Robert Vineberg was the main guy, but when he would run out of heroin Vineberg would send a guy named Max Rosenblum to get more smack from someone down the street.
As we reported, Vineberg was arrested in Tuesday's bust and has been charged with felony heroin possession with an intent to sell. He pled not guilty. Rosenblum has been charged with misdemeanor cocaine possession.
As for the "dealer down the street" -- he was not arrested. The informant claims that dealer was selling low-grade, very dangerous heroin. The informant says he came forward because he believes Hoffman may have been using the stash from the dealer down the street when he died.