Episodes
Mark of a Killer: The Monster (S3EP11 Oxygen Sat April 2, 2022)
The Monster: An analytical look is taken at the signature mark and modus operandi of infamous serial killers with firsthand accounts from detectives familiar with the case and insight from psychological experts, who shed light on the killer’s mind.
Airdate: Sat April 2, 2022 at 20:00 on Oxygen
Season 3 Episode 11
Serial killer behaviors, postmortem rituals, and crime scene souvenirs are examined in Mark of a Killer.