Eastchester police are asking the public for help in the case of a man who was found dying on a quiet street Monday.

Forty-seven-year-old Steven Schwartzberg, of Long Island, was found near death early Monday on Lispenard Avenue in a residential section of Eastchester. Police still don?t know what killed Schwartzberg. Autopsy results were inconclusive and toxicology tests aren't due back for several weeks. Schwartzberg was reportedly set to meet up with friends in Port Chester. Police say he was last seen Sunday on a surveillance video in Grand Central Station, identifiable by a German soccer club cap he was wearing. They say Schwartzberg didn't actually get on the train, and that's where the mystery began. Police aren?t sure if Schwartzberg got a ride or took a cab to Westchester County. Schwartzberg was married and came from a successful Scarsdale family that owns nursing homes in four states. Sources say he did have some mental health problems and had taken medication in the past. Police also have surveillance video of the street where he was found. However, they say there were no injuries or obvious signs of what killed him.

Anyone who has information about the hours leading up to Schwartzberg?s death is asked to contact the Eastchester Police Department at 914-771-3365.