Killer Unknown

America's finest come out of retirement to crack open 31 cold cases in Tulsa County, Oklahoma.

A conversation prompts the task force to take a fresh look at alibis in the Dena Dean case.

Veda Woodson's devastated family recounts the horrifying moments leading up to her murder.

Pressure builds as Mike Huff narrows is focus to a man who was Dena Dean's boyfriend in 1998.

A suspect's family may be hiding a dark secret in the Veda Woodson case.

The task force races to put the evidence they've collected towards prosecution.