killing field? >> possibly. >> reporter: there are so many questions. >> we're interviewing agt of people. >> reporter: so far, no one's being calmed a suspect in the deaths of four women, all prostitutes, and four more still unidentified bodies found months later. it's not clear whether they're connected. we're talking about one killer or two killers? >> it's almost impossible to know that right now. we have bodies in various conditions, and states. >> reporter: there are possible links. some victims were wrapped in burlap, family was told. a law enforcement says some in black plastic, possibly a bag. police know the alleged killer used throw away cell phones to contact victim whose advertised on craigslist. including melissa. using melissa's cell phone after she disappeared made several taunting calls from the victim's sister from spots like times square where he couldn't be traced and allegedly admitted