Killer Unknown

America's finest come out of retirement to crack the 31 cold cases of Tulsa County opening two of the most notorious murders: 16-year-old Dena Dean, abducted and murdered in 1998, and 38 year old Veda Woodson, raped and murdered on a deserted road in 1973

An effort to find Dena's friend Brandi may yield results, and conversations reveal a tense relationship Dena had right before her murder, prompting the Task Force to take a fresh look at alibis. Could a simple secret have put Dena's life mortal danger?

A devastated family recounts the horrifying moments leading up to the murder Veda Woodson on a deserted road. Was it someone she knew? And on the Dean case, early investigators look into Dena's family to arrive at a shocking conclusion.

Mike Huff narrows his focus to a young man who was Dena Dean's boyfriend in 1998, and the last people she had contact with the day of her disappearance.

On the Dean case, phones are confiscated with a new plan to comb through communications between persons of interest. Will the data reveal incriminating information? On the Woodson case, Huff thinks a suspect's family may be hiding something.

On the Dena Dean case, the Task Force races to put the information they have collected towards prosecution. On the Veda Woodson case, a shocking new DNA breakthrough keeps this 45 year old murder from going cold for good.