In Part 3 of Famous or Infamous Trials: The Devil Made Me Do It, Dr. Josh Carpenter examines the homicide investigation, criminal trial, and verdict in the case of Arne Cheyenne Johnson, explaining why the infamous "devil made me do it" defense was never actually presented to the jury.

Separating courtroom history from popular mythology, Dr. Carpenter explores the rules of evidence, the judge's decision to exclude claims of demonic possession, and the lasting legal significance of one of America's most misunderstood criminal trials. The episode concludes by examining how books, films, and media transformed a Connecticut homicide case into one of the most enduring legends in modern legal history.