Investigators have identified Robert's son, Thomas Ryan, as the suspect in the homicide. Thomas Ryan remains at large as State Police and a long list of law enforcement agencies continue working to locate him. Multiple other agencies are assisting, including the Middletown Police Department, Port Jervis Police Department, Orange County Sheriff's Office, NYPD and FBI. Anyone who believes they have seen Thomas Ryan or the gray Toyota Prius should not approach him or attempt to confront him. Anyone with information about Ryan's whereabouts should immediately call 911 or contact New York State Police Troop F Communications at 845-344-5300.