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.
C. Robert Cargill (credited as Kit Lesser)'s first screenplay written solo, without any involvement of his frequent screenwriting partner, Scott Derrickson.
Bill mentions Henry Lee Lucas, a murderer who made up stories about people he had killed, meaning he wanted Bundy to tell the truth.
FBI Analyst, Bill Hagmaier is a graduate of Slippery Rock University of Pennsylvania.
When Bundy says he and Hagmaier should write a book together, he says that they could call it The Bill and Ted Show. The film Bill & Ted's Excellent Adventure (1989) was released less than a month after Bundy's execution in 1989.