11 million people are under red flag zones in colorado and mexico. now back to dateline. zblmpls zblmpbls dateline. zblmpls zblmpbls . welcome back to dateline. i m craig melvin. michelle martinko s unsolved murder marked a loss of innocence for her friends and family, but not a loss of hope. cold case detectives were determined to catch the killer using a modern arsenal of tools. the same technology used to crack a legendary case in california was about to reveal a tantalizing clue. back to dennis murphy with and then there were three. the decades old investigation into michelle martinko s 1979 murder had a new urgency. the detective doug larrison had a dna profile of the killer and original list of suspects.