Yolanda McClary, Kelly Siegler Yolanda McClary, Kelly Siegler

On the winter finale of TNT's Cold Justice, former prosecutor Kelly Siegler and former crime scene investigator Yolanda McClary head to Jasper County, Iowa to try to drudge up new clues in a double homicide that has haunted the town for three decades.

Law & Order producer Dick Wolf enters true crime territory with Cold Justice

In 1983, the community was rocked by the murders of 17-year-old Melisa Gregory and 20-year-old Steven Fisher, which were never solved.

In the exclusive clip below, Yolanda and Kelly team up with local law enforcement officials — some of whom were acquainted with one of the victims — to try to crack the case. Will they be able to bring closure to the two victims' families?

Cold Justice's winter finale airs Friday at 8/7c on TNT.