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.” … Continue reading Diary of a Killer S46Ep9 Preview via @stacyamiller85 @ABC2020 @ABCNetwork #AngelaBledsoe