ads that the suspect or others posted on numerous web sites . Law enforcement authorities now have evidence that the investigation appears to connect to at least 30 different ads or other postings on at least 15 different websites , separate and distinct from ours , '' Suskin said . `` We are not aware of the existence of any evidence that would indicate which of these many sites were used by the suspect to establish contact with his victims . '' The most recent deaths were discovered early Sunday , when police found the bodies of two women , burned beyond recognition , in the trunk of a burning car . The victims have been tentatively identified and are believed to be 28 and 29 years of age , Godbee said . Neither body showed obvious signs of trauma , he said . Six days earlier , on December 19 , the bodies of two other women were found in the trunk of a car parked at a vacant dwelling , Detroit police said . While autopsy results , including toxicology tests , are not complete , `` we are proceeding as if this is two murder scenes ,
-LRB- CNN -RRB- -- The deaths within a week of four women -- three of whom had advertised in an adult personals section of a website -- are being treated as the work of one person or group of people , Detroit 's police chief said Tuesday . `` At this point , we are working it as one case or one suspect or set of suspects , '' Chief Ralph L. Godbee told CNN . `` There are too many common links for us not to , at this point , work this as one single investigation . '' Among those links , he said , is the fact that three of the women had placed online ads dealing with `` prearranged adult dating services '' and posted on backpage.com , Godbee told reporters Monday . `` We felt it is imperative to alert the public that deciding to meet unknown persons via the Internet can be extremely dangerous , '' Godbee said . But a lawyer for backpage.com , Steve Suskin , said it was not clear that his company 's website was involved . `` Our team has already provided the police with detailed information about the