There's a scene where Bundy asks why the FBI didn't send Douglas. He's talking about criminal profiler John Douglas who wrote the book "Mindhunter" on which the TV series is based upon.
Bill mentions Henry Lee Lucas, a murderer who made up stories about people he had killed, meaning he wanted Bundy to tell the truth.
C. Robert Cargill (credited as Kit Lesser)'s first screenplay written solo, without any involvement of his frequent screenwriting partner, Scott Derrickson.
FBI Analyst, Bill Hagmaier is a graduate of Slippery Rock University of Pennsylvania.
The film it's based on real life transcripts selected from conversations between serial killer Ted Bundy and FBI Special Agent Bill Hagmaier that happened between 1984 and 1989, and the complicated relationship that formed between them during Bundy's final years on death row.