In 1947, Elizabeth Short was murdered. Her bisected body was left in a vacant lot in Los Angeles, leading her death to become highly publicized. The 22-year-old was given the nickname “The Black Dahlia,” and her death is the most notorious unsolved murder in American history.

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Retired LAPD detective Steve Hodel began to investigate the mysterious murder in 1999, after he learned his father, Dr. George Hodel, was a prime suspect shortly after Short’s body was found. On Wednesday’s episode of Dr. Phil, he shares the details of his investigation. In the video above, Dr. Phil and Steve review transcripts from surveillance recordings taken in George’s home in 1950. What do they reveal?

WATCH: Who Was 'The Black Dahlia'?

And, on Wednesday, hear from George Hodel’s great-granddaughters whose top-ranked podcast, “Root of Evil: The True Story of the Hodel Family and the Black Dahlia,” is gripping the nation with never-before-heard archival audio of disturbing family secrets. Check here to see where you can watch.

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