20/20 returns for Season 46 on September 29, 2023.

Season 46  Episode 9 is titled “Diary of a Killer” Here is the synopsis from TV Guide” When a beloved mother is killed, police uncover clues in the accused killer’s diary.”

https://people.com/lawyer-convicted-killing-girlfriend-dies-custody-7550452

Don’t miss 20/20  “Diary of a Killer” airing Friday, December 8, 2023 at 9/8c on ABC.

Photo Courtesy of ABC News

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