COPS IN New York arrested today the man they believe is responsible for the Long Island pharmacy massacre on Father's Day. David Laffer, 33, and his wife Melinda Brady were busted by heavily armed cops Wednesday. Described as quiet, one pal told the New York Daily News that Laffer and his wife was had pain pill problems. He had recently lost his job and drug plan. On Sunday, a man walked into a family-owned pharmacy in Medford and executed two employees and two customers. There were no signs of a struggle.Friend Joanna Martino said: "This past weekend Melinda was trying to find out if anyone knew what hospital she can go to to get a scrip for pain pills." The arrests following an intense three-day manhunt



