A copy of the October 1948 issue of True Detective with a cover story on “The Black Dahlia Murders” has been listed on EBay. This is the magazine that got poor old Leslie Dillon in trouble. The article by George Clark identifies Dr. Joseph Paul De River as “an eminent psychiatrist and head of the Sex Offence Bureau of the Los Angeles Police Department” and gives his views on the case.
Leslie Dillon’s postcard, in an image from the Los Angeles Public Library.
After reading the article, Dillon wrote to De River about his theories on the Black Dahlia case and De River developed the notion that Dillon had a split personality and under an alternate identity named Jeff Connors killed Elizabeth Short.
Without telling homicide detectives, De River launched his own investigation, enticing Dillon to meet him in Las Vegas under the pretense of serving as his secretary. De River and the LAPD’s gangster squad picked up Dillon and on the drive to Los Angeles, stopped at Banning, where De River began interrogating Dillon, who eventually sailed a postcard out a window saying that he was being held captive and to please get him a lawyer.