(CNN) - Remains found Monday on Long Island, New York, have been identified as being human, police said Tuesday. The remains, along with a human skull also found Monday, were found as authorities investigate a suspected serial killer operating in the area. Police have not confirmed whether the newest remains are linked to eight other sets of human remains found in Suffolk County, just to the east of Nassau County. Investigators are working on the presumption that a single person is responsible for the deaths. The four victims who have been identified thus far all advertised prostitution services on websites such as Craigslist, authorities have said.
What are the theories on who killed these women? Today on American Morning, Kiran Chetry and Christine Romans ask criminologist Casey Jordan. Jordan dissects the leads and evidence in the case.