karen mitchell who got into the car. and bob durst's eyes were not blue. and said, chief mills do is just take something that's sensational and plug that person into the midst of an investigation that may or may not have anything to do with them. keith morrison: but the investigation continues and some, like birkbeck, believe there may be more. i've never said definitively that he was a serial killer. what i said was that there's so much out there about him that clearly, there's something going on here, and that law enforcement needs to look into it, and thankfully, they are doing it now. keith morrison: waste of time, said dick deguerin. well, there's no evidence. and to think, they have to have a theory that he's some kind of serial killer. he's not a serial killer. but the notion of robert durst as a serial killer has come up. a guy who-- well, it sells magazines. it sells books. it causes people to turn on their tvs. keith morrison: a long-missing wife, a dismembered neighbor, a murdered friend-- this is how robert durst is defined now. where did it all go wrong? all that p