Watch Mark of a Serial Killer Clip: Wall of Victims - NBC.com

Main Content

NBC Quick Links

Advertise
Link TV Provider
FAQ
Casting
Contact Us
Local Schedule
Tickets and NBC Studio Tour

Corporate Info
Accessibility
Jobs
Ad Choices
Privacy Policy
CA Notice
Terms of Service - NEW
NBC App
Peacock
Advertise
Closed Captioning
Parental Guidelines and TV Ratings
Video Viewing Policy
Viewer Panel
Shop

A Division of NBCUniversal
©2025 NBCUniversal Media, LLC