Episodes
Mark of a Killer: The D.C. Sniper (S3EP14 Oxygen Sat April 23, 2022)
The D.C. Sniper: A serial sniper terrorises the entire Washington, D.C. metro area by targeting random victims in public and in plain sight.
Airdate: Sat April 23, 2022 at 20:00 on Oxygen
Season 3 Episode 14
Serial killer behaviors, postmortem rituals, and crime scene souvenirs are examined in Mark of a Killer.