separate incidences where two young ladies in each incident have been discovered deceased in vehicles on the east side of detroit. >> we have four homicides of which a serial pattern is developing. >> the first set of women were found on december 19th, dead in the trunk of a car on promenade street on detroit's east side. >> investigators now believe three of the victims may have met their killer online in the adult services section of the website backpage.com. >> this tie for us is disconcerting. >> it's alarming. and obviously, women in the city of detroit, you know, were very concerned. >> the murders are a brutal reminder of the constant danger and fear that stalks girls and young women every single day they work in the underground sex trade. >> this is a dangerous proposition. there's no way to tell who you're dealing with, what their motives may be, and the ultimate