Ruh-roh!

Patricia Cornwell's Portrait of a Killer: Jack the Ripper - Case Closed (spoiler: Walter Sickert) shows why novelists should not investigate real-life crimes. 

Also best-selling author Michael Connelly's podcast Killer In The Code likewise drives a cracking theory supported by eerie happenstance people believe is more than that. 

Connelly's premise is codebreaker Alex Baber's that the "Black Dahlia" Elizabeth Short's murderer was also the Zodiac Killer. Reporter Larry Harnisch takes the theory apart.