Police in Las Vegas match unknown man 's DNA with Six slain women . seven of the victims were prostitutes and the seventh a runaway . There has been a higher clearance rate -- 78 percent -- in other homicides . Suspect has avoided arrest for 2007 and is not on any DNA database . Investigation will require tips from the community , Milwaukee police chief says .
Police in Las Vegas match unknown man 's DNA with Six slain women . seven of the victims were prostitutes and the seventh a runaway . Suspect has avoided arrest for 2007 and is not on any DNA database . Investigation will require tips from the community , Milwaukee police chief says .