A quarrel between two roommates on the Upper West Side left one dead yesterday, stabbed several times inside his apartment. Police responded to a 911 call around 12:30 p.m. yesterday and discovered the body of the 51-year-old victim already deceased when they arrived on the sixth floor of 145 W 71st Street. West Side Spirit reports that elevators were shut down and the SWAT team called in as part of the initial response. Eventually police tracked down the roommate, 51-year-old Frederick Zappulla, in Yonkers after he had allegedly confessed to the crime to his brother. Zappulla was charged with second-degree murder after police interrogated him for several hours. The Post says that the victim worked as a cleaner and had lived in the building for over thirty years.