And Then There Were Three Dateline: Unforgettable : Season 1 Episode 7
Oxygen 2h 00m
Aired: December 21st, 2021 @ 8:00 PM EST on Oxygen
The case involved detective work so unique, it managed to stay with Dennis Murphy for years; days before Christmas, Michelle Martinko was visiting the mall when she was found stabbed to death; investigators found her killer almost 40 years later.
