Killer Unknown

America's finest come out of retirement to revisit the 1998 abduction and murder of 16-year-old Dena Dean and the rape and murder of 38-year-old Veda Woodson on a deserted road in 1973.

An effort to find Dena's friend, Brandi, may yield results; the discovery of a relationship fraught with tension in Dena's life prompts the Task Force to take a fresh look at alibis.

A devastated family recounts the horrifying moments leading up to the murder of Veda Woodson on a deserted road; on the Dean case, early investigators look into Dena's family only to arrive at a shocking conclusion.

Mike Huff focuses on a young man who was Dena Dean's boyfriend in 1998 and on the people with whom she had contact before her disappearance.

On the Dean case, phones are confiscated with a new plan to comb through communications between persons of interest; 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.