College professor and renowned entomologist Marianne Shockley went swimming with her boyfriend Marcus Lillard and their friend Clark Heindel, who got together in a small Georgia town one spring night. By morning, she and Clark were dead. Only her boyfriend, Marcus, lived to tell what happened that night. This encore episode of "48 Hours" last aired on 6/17/2023.

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The Strange Death of Professor Shockley

“48 Hours” uncovers the narrative behind crime and justice cases that have left a lasting mark on society. Award-winning CBS News correspondents thoughtfully examine the complexities of each crime by transporting you to the heart of the investigation through key evidence and gripping interviews with critical figures from the case. The unmatched reporting has made a tangible difference in countless lives, leading to the exoneration of wrongly convicted individuals and the reopening — and resolution — of previously closed cold cases. Listen to a new “48 Hours” episode every Monday&nbsp;and&nbsp;then go deeper into the case on Tuesdays with the immersive “Post Mortem” series — producers and correspondents join host Anne-Marie Green to discuss key evidence, dead ends, mishaps, and stranger-than-fiction twists they faced in the field. Plus, every Thursday, we’ll revisit a classic “48 Hours” episode.&nbsp; Watch “48 Hours” Saturdays 10/9c on CBS and Paramount+. 48 Hours listeners can use discount code "HOURS20" for 20% off all 48 Hours products on ParamountShop.com.

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Correspondent Tracy Smith and Producer Gayane Keshishyan Mendez discuss the case of Susann Sills, a mother of twins who was found dead at the bottom of a staircase in the home she shared with her husband, a renowned fertility doctor. The team discusses the 911 call made by Dr. Sills, the police interview with a woman investigators believed he was courting, and the defense’s unusual theory that the family dogs were involved in Susann's death.

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Post Mortem | The Puzzling Death of Susann Sills

The wife of a fertility doctor is found dead at the bottom of a staircase. Did her dogs play a role in her death or was the scene staged to cover a murder? Correspondent Tracy Smith reports.

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The Puzzling Death of Susann Sills

Holly Dunn tells her account of the August 29, 1997 attack on the railroad tracks by the University of Kentucky. Chris Maier was killed and Holly Dunn, who was stabbed, beaten and raped, miraculously survived her injuries. Fourteen months after Holly’s attack, Dr. Claudia Benton was murdered inside her Houston, TX area home, located near railroad tracks. Lexington Detective Craig Sorrell received a call from ViCAP, a national crime registry database, linking the crimes. Through fingerprint analysis, they identified a suspect. This classic "48 Hours" episode last aired on 8/3/2013. Watch all-new episodes of “48 Hours” on Saturdays, and stream on demand on Paramount+.

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Live to Tell: The Railroad Killer

Pamela Hagan lived in a quiet, wealthy Virginia suburb, surrounded by family: her daughters Megan, Helen, and her granddaughter lived with her in her million-dollar home. From the outside, the Hargan women had it all. But even though there was love, there were also grievances. When Pamela and Helen were found dead in an apparent murder-suicide, detectives had to ask: what was going on inside the Hargan household?

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Home From Texas | Blood is Thicker: The Hargan Family Killings

Go behind the scenes with Correspondent Peter Van Sant and Producer Judy Rybak as they discuss the decades long manhunt for William Greer, a man charged with killing his girlfriend Tammy Myers. Hear about what it was like interviewing U.S. Marshals and their clever name for their pursuit: Operation Catch A Toe.

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The Strange Death of Professor Shockley

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