However, it’s important to note that she and the writing team drew upon facts from Bella Stumbo’s book, Until the Twelfth of Never: The Deadly Divorce of Dan and Betty Broderick, among other source material about the case.
Dirty John’s showrunner ultimately described Betty Broderick’s spiral as an “untethering from reality.”
That said, Alexandra Cunningham conceded that exploring the chain of events from Broderick’s perspective would make for a slightly imbalanced crime story.