A New Milford man has been arrested for illegal operation of a drug factory.  Officers launched an investigation months ago into the distribution of crack cocaine from a Bel Air Drive home.  Detectives, K9 Mattis, along with the Northwest Statewide Narcotics Taskforce, carried out a search warrant at the home of 40-year old David Crescenzo on Thursday.  He was also charged with possession of drug paraphernalia and convicted felon in possession of firearm and ammunition. Crescenzo was held on a $250,000 bond.