It's a Zodiac Killer episode of The Megyn Kelly Show's Hot Crime Summer week. Megyn Kelly is joined by Tom Colbert, investigative journalist and founder of The Case Breakers, to break down the shocking and brutal story of The Zodiac Killer, what's behind the Zodiac "confessions" through calls and letters, the disturbing crimes we know of, DNA and other advances in crime technology, the difference between psychopaths and sociopaths, possible motives, and who Colbert and his team believe the Zodiac Killer was. We also go through other theories about the potential identity of the still-unidentified serial killer.