New Milford Police K9 Mattis helped officers recover 140 bags of heroin and other drugs during a traffic stop recently.  New Milford Police say 40-year old William Slade was arrested on Main Street.  Mattis hit on several locations of the car and turned up the 14 bundles of heroin, 14 bags of cocaine and several ecstasy pills. Charges included Possession with intent to sell, Possession within a school zone.  Chief Cerruto commended officers for "keeping the pressure on drug dealers."