had advertised on craigslist. >> i mean we have eight sets in suffolk county already. we have two more now. it's all been very startling. i don't have a reaction to you because it's amazing that we're finding these things. obviously we have a lot of work to do. >> reporter: the work is ongoing o. the medical examiner now checking everything he possibly can with regard to those remains. that happening here in nassau county, and the work continues in suffolk county as well. now, let's step back. this story all start when this woman, shannon gilbert, went missing about a year ago not far from here. she also had been working as a prostitute. she had not been found. he remains, if she is dead, have not been found. >> allan, do police think a sungle person is responsible for all these killings? >> reporter: they're certainly