SEAFORD - Nassau County police say an armed suspect and a federal agent have been fatally shot in an attempted pharmacy robbery this afternoon. Police say an unidentified gunman walked into Charlie's Family Pharmacy on Merrick Road shortly before 2 p.m., demanding cash and drugs. Shots were fired as he left the store, where he was confronted by off-duty ATF Special Agent John Capano, of Melville, an off-duty New York City police officer and a Nassau County police officer. Capano was rushed to Nassau University Medical Center, where he later died. The gunman died at the scene. Witnesses say the entrance to the pharmacy was splattered in blood, with drugs scattered on the floor.