Images of the person who the police believe shot two homeless people in Lower Manhattan early Saturday. Police in New York have appealed to the public to help identify a man who shot at least two homeless people Saturday, killing one of them as he slept on the street. Credit: NYPD

File Photo: A shooter first fired on a 38-year-old man in Lower Manhattan early Saturday, wounding but not killing him, investigators said. Then, shortly before 5:00 pm, police in the same neighborhood found the lifeless body of another man in a sleeping bag. He had been shot in the head and neck. Photograph: James Veysey/Rex/Shutterstock

File Photo: Video surveillance footage captured that attack, showing the shooter firing at the second man as he slept around 6:00 am, shortly after the first incident. Sunday night, a third man appeared to have been attacked with a possible gunshot wound, NBC New York citing police. (New York Daily News)