The 27-year-old man who shot and killed four people at a Midtown office building on Monday carried a note in his pocket, police sources told ABC News.
NYPD officers and other police officers wait for the ambulance transfer of slain NYPD officer Didarul Islam, who was killed during a mass shooting in Midtown Manhattan, at New York-Presbyterian/Weill Cornell Medical Center in New York City, U.S., Jul... [3866 chars]