48 Hours

48 Hours

“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 and 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. Also available on the 48 Hours YouTube channel. Plus, every Wednesday and Thursday, we’ll revisit a classic “48 Hours” episode. Get ad-free access to 48 Hours podcasts by subscribing to 48 Hours+. Subscribe at 48HoursPodcasts.com, then listen in Apple Podcasts, Spotify, or use your private link in your favorite podcast app.
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Episode's summary

This episode investigates the disappearance and murder of 19-year-old Lizzie Marriott, focusing on the role of her acquaintance Kat McDonough and her boyfriend Seth Mazzalia. The investigation explores a dark lifestyle involving BDSM that connected the individuals and follows the timeline from Lizzie's disappearance to the discovery of evidence. The narrative details the trial and sentencing of Seth Mazzalia, featuring testimony from his accomplice, Kat McDonough. The prosecution presented evidence of a violent, controlling relationship and a calculated cover-up involving the disposal of the body, ultimately resulting in a jury verdict of first-degree murder and a life sentence without parole.

Chapters

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Highlights

He said there was sex. Something went wrong, and Lizzie died.

00:10:38 · The segment recounts Seth Mazzalia's shocking admission regarding the events leading to Lizzie's death.

It's this slow descent into lack of choices to to the point where I can't leave.

00:14:25 · A former partner of Seth describes the psychological control he exerted over his victims.

He moved up behind her and he pulled the rope over her neck and strangled her.

00:23:18 · Kat McDonough provides eyewitness testimony describing the exact moment of Lizzie's death.

Guilty of first-degree murder by strangulation. Guilty of first-degree rape and murder.

00:35:16 · The court official announces the jury's guilty verdicts against Seth Mazzella.

On charge ID 779, first-degree murder, you were sentenced to the New Hampshire State Prison for life and shall not be eligible for parole.

00:38:04 · The judge delivers the final sentence to Seth Mazzella.

Episodes

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Dangerous Games

This episode investigates the disappearance and murder of 19-year-old Lizzie Marriott, focusing on the role of her acquaintance Kat McDonough and her boyfriend Seth Mazzalia. The investigation explores a dark lifestyle involving BDSM that connected the individuals and follows the timeline from Lizzie's disappearance to the discovery of evidence. The narrative details the trial and sentencing of Seth Mazzalia, featuring testimony from his accomplice, Kat McDonough. The prosecution presented evidence of a violent, controlling relationship and a calculated cover-up involving the disposal of the body, ultimately resulting in a jury verdict of first-degree murder and a life sentence without parole.

22 Oct 2026
1272-

Fatal Choice

This episode investigates the death of Dr. Peter Franklin, who was stabbed by his wife, Sandra. While Sandra claimed she acted in self-defense against a violent attack, investigators uncovered evidence suggesting an ambush and identified significant inconsistencies in her story. The subsequent trial focused on motives involving a divorce settlement and life insurance. Despite defense arguments regarding a discovered penknife, the jury found Sandra Franklin guilty of murder, resulting in a sentence of 15 years to life.

21 Oct 2026
1271-

Post Mortem | The Detective and the Chewing Gum Sting

In this season premiere of Postmortem, hosts explore Detective Susan Logothetti's investigation into a decades-old murder. The episode details how advancements in DNA technology shifted suspicion from Bill Richards to Mitchell Allen Gaff, a dangerous predator, and describes the ingenious undercover chewing gum sting operation used to collect Gaff's DNA. The successful sting ultimately linked Gaff to both the Judy Weaver and Susan Vesey murders. The conversation also covers the aftermath of his arrest, the emotional impact on victims' families, and the investigative dedication required to solve these cold cases.

20 Oct 2026
1270-

The Detective and the Chewing Gum Sting

This episode investigates the cold case murder of Judy Weaver in 1984, which was initially blamed on her fiancé before advanced DNA technology identified Mitchell Allen Gaff as the true killer. The investigation reveals Gaff's violent history of sexual assaults and details Detective Susan Logothetti's clever use of a chewing gum ruse to secure a DNA match. The narrative follows the pursuit of justice through the discovery of new evidence linking Gaff to the murder of Susan Vesey. It concludes with Gaff's sentencing to 50 years in prison, featuring emotional victim impact statements and reflections on the long-awaited accountability for his crimes.

19 Oct 2026
1269-

A Mother Vanishes: Inside the Bhatt Murder Trial

This episode explores the trial of Naresh Bhatt, who is charged with the murder of his wife, Mamta Kafle Bhatt. The discussion details the investigation, including reporter Katie Lusso's early interactions with the defendant and testimony regarding a history of domestic violence and financial abuse. The coverage also examines the prosecution's use of inconsistent statements and investigative testimony to build their case, contrasted against a defense strategy focused on witness bias and the lack of physical evidence. Finally, the episode reflects on the courtroom dynamics involving language barriers and the emotional toll the case has taken on Mamta's mother and her young daughter.

16 Oct 2026