| Person | Type | Job | Role(s) | Episodes |
|---|---|---|---|---|
 Joe Berlinger | Crew | Production | Executive Producer, Director, Creator | 3 |
 Jon Kamen | Crew | Production | Executive Producer | 3 |
 Mike Mathis | Crew | Production | Executive Producer | 3 |
 Adam Stone | Crew | Camera | Director of Photography | 3 |
Jon Doran | Crew | Production | Executive Producer | 3 |
Justin Melland | Crew | Sound | Original Music Composer | 3 |
Steve Seukiw | Crew | Lighting | Gaffer | 3 |
Cy Christiansen | Crew | Editing | Additional Editor | 3 |
Jen Isaacson | Crew | Production | Executive Producer | 3 |
David Polsdorfer | Crew | Editing | Online Editor | 3 |
R. Hollis Smith | Crew | Sound | Supervising Sound Editor, Sound Re-Recording Mixer | 3 |
Jennifer Honn | Crew | Editing | Editor | 3 |
Alan Chow | Crew | Sound | Sound Mixer | 3 |
Yohance Brown | Crew | Editing | Colorist | 3 |
Catharine Park | Crew | Production | Executive Producer | 3 |
 John Wayne Gacy | Cast | Actor | Self (archive footage) | 3 |
Sam Amirante | Cast | Self | 3 | |
 John Hinckley Jr. | Cast | Actor | Self (archive footage) | 1 |
 Anthony Antonucci | Cast | Self | 3 | |
| Person | Type | Job | Role(s) | Episodes |
