48 Hours
48 Hours
April 25, 2026

Terrifying Events | "48 Hours" Full Episodes

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Quick Read

Explore three chilling true crime cases, including the Son of Sam murders, a suspicious scuba diving death, and a brutal bathtub murder, revealing the complex investigations and psychological depths of the accused.
David Berkowitz terrorized NYC as 'Son of Sam,' later claiming demonic influence and finding religion in prison.
David Swain's unemotional response and financial motives led to his conviction for his wife's diving death, later overturned.
David Tronis's calm demeanor and secret life complicated the investigation into his wife's murder amidst a house renovation obsession.

Summary

This episode of "48 Hours" reconstructs three distinct and terrifying criminal cases. The first segment revisits the 1977 Son of Sam murders in New York City, detailing David Berkowitz's reign of terror, the city's fear, the media's role, and Berkowitz's current claims of being a 'born again' Christian. The second case examines the suspicious 1999 scuba diving death of Shelley Tyer in Tortola, focusing on her husband David Swain, his unemotional demeanor, the financial motives, and the legal battles that saw him convicted in civil court, then criminally, only for his conviction to be overturned. The final segment delves into the 2018 murder of Shanti Cooper in Orlando, where her husband David Tronis was accused, highlighting the dilapidated house at the center of their disputes, Tronis's calm interrogation, his secret life, and the controversial evidence that emerged.
These cases highlight the profound impact of violent crime on victims, families, and communities, illustrating the complexities of criminal investigations, the challenges of proving motive, and the psychological nuances of alleged perpetrators. They also expose how personal histories, financial pressures, and public perception can shape the pursuit of justice, sometimes leading to prolonged legal battles and unresolved questions for those left behind.

Takeaways

  • David Berkowitz, the 'Son of Sam,' terrorized New York City in 1977, killing six and wounding seven with a .44 caliber revolver.
  • Berkowitz claimed a demon, speaking through his neighbor's dog, ordered him to kill, a claim he later attributed to 'demonic entities' he served.
  • His capture was aided by a parking ticket issued near the scene of his last murder, leading police to his address and the 'Son of Sam' letters.
  • David Swain was accused of murdering his wife, Shelley Tyer, during a scuba dive in Tortola in 1999, driven by financial motives and an extramarital affair.
  • Swain's unemotional response to his wife's death and his traumatic childhood (abusive father, mother murdered by brother) were central to his defense.
  • He was found liable in a civil wrongful death suit and later convicted of murder, but his criminal conviction was overturned due to judicial error.
  • Shanti Cooper was found dead in her bathtub in 2018; her husband, David Tronis, was the primary suspect due to her extensive injuries and his calm demeanor during interrogation.
  • The couple's dilapidated house renovation, funded by Shanti, and Tronis's secret life (multiple memberships to a gay bathhouse) emerged as potential motives.
  • A jailhouse informant claimed Tronis confessed to killing Shanti after she discovered his secret life and threatened to expose him.

Insights

1The Son of Sam's Reign of Terror and Psychological Claims

David Berkowitz, known as the 'Son of Sam' and the '44 Caliber Killer,' instilled widespread fear in New York City during his 1977 murder spree. He targeted young couples, often women with dark, shoulder-length hair. Berkowitz later claimed his actions were dictated by a demon communicating through his neighbor's dog, a narrative he now attributes to 'demonic entities' he served in his ignorance and shame. Despite his current 'born again' Christian status and expressions of regret, victims' families remain unforgiving.

Berkowitz signed notes as 'Son of Sam' and described being compelled to kill (, ). He stated he was serving a 'demonic entity' (, ). His capture was linked to a parking ticket near the scene of his last crime ().

2David Swain's Suspicious Scuba Death Case and Overturned Conviction

David Swain was accused of murdering his wife, Shelley Tyer, during a 1999 scuba dive in Tortola. The prosecution highlighted his unemotional response to her death, a significant life insurance payout, and an extramarital affair as motives. Expert analysis of Shelley's damaged diving equipment suggested foul play. Despite a civil court finding him responsible and a criminal conviction, Swain's murder conviction was ultimately overturned on appeal due to the trial judge's refusal to allow accidental death as a defense, leading to his release.

Shelley's mask was broken and snorkel mouthpiece dislodged, suggesting a struggle (, ). David's quick cessation of CPR was deemed inappropriate (). He collected over $600,000 from her estate and began dating Mary Bassler two months after Shelley's death (, ). His conviction was overturned because the trial judge refused to let the jury consider accidental death as a defense ().

3The Murder of Shanti Cooper Amidst a House Renovation and Secret Life

Shanti Cooper was found extensively beaten and strangled in her bathtub in 2018, with her husband, David Tronis, quickly becoming the prime suspect. The couple's protracted and costly house renovation, largely funded by Shanti, created significant stress. Tronis's calm, unemotional demeanor during a 14-hour interrogation, coupled with the discovery of his secret life (multiple memberships to a gay bathhouse), fueled suspicions. A jailhouse informant later claimed Tronis confessed to killing Shanti after she threatened to expose his secret.

Shanti was extensively beaten and strangled (, , ). The house renovation was an 'expensive failure' and 'unlivable' (, ). Tronis had several memberships to Club Orlando, a same-sex bathhouse (). A jailhouse informant, Edward Gizmandi, claimed Tronis admitted to snapping and killing Shanti after she found messages on his phone about his sexual activity with men ().

Lessons

  • Recognize that outward emotional displays do not always reflect inner grief or guilt, as seen in David Swain's case, and avoid premature judgments based solely on demeanor.
  • Understand the critical role of forensic evidence and expert testimony in complex criminal cases, especially when reconstructing events like a diving accident or a domestic murder.
  • Be aware of the potential for hidden motives, such as financial gain or secret lives, to complicate investigations and challenge initial perceptions of a suspect.

Notable Moments

New York City's fear during the Son of Sam killings

The widespread terror, with people staying indoors and women cutting/dyeing their hair, illustrates the profound societal impact of an active serial killer.

David Berkowitz's current 'born again' Christian persona

This highlights the controversial nature of rehabilitation for notorious criminals and the enduring pain of victims' families who may never forgive.

David Swain's unemotional response to his wife's death

His detached demeanor was a key factor in raising suspicion and contributed to both civil and criminal accusations, despite his traumatic past being offered as an explanation.

The overturning of David Swain's murder conviction

This demonstrates the intricate legal process and how procedural errors, even in seemingly clear-cut cases, can lead to a reversal of justice and a free man.

David Tronis's calm and uncooperative demeanor during interrogation

His refusal to confess or show expected emotion led detectives to conclude he was lying, showcasing the psychological warfare often employed in interrogations.

Discovery of David Tronis's secret life at a gay bathhouse

This revelation provided a potential motive for Shanti Cooper's murder, suggesting a hidden life that could have led to a fatal confrontation.

Quotes

"

"He is compelled to kill. I think people are really shook up."

Unknown
"

"He was writing about a dog that talked to him, gave him orders to kill. I mean, he just was going out 30 nights a month looking for someone to kill."

Unknown
"

"My name is David Burkowitz and I've been locked up since the time of my arrest, just under 40 years."

David Berkowitz
"

"To do this to a young girl and a young boy, he's not human."

Unknown
"

"As far as I'm concerned, that that was not me. That was not me. This even the that name I I hate that name. I despise that name. That which name? That moniker son of Sam. That's that that that was not that was a demon. That that was that was the a demonic entity that I was serving in in my ignorance, my shame."

David Berkowitz
"

"I truly do not believe that this was an accident. In my opinion, it was murder."

Unknown
"

"I mean, it made me sad, but not angry. They didn't know diving."

David Swain
"

"He is a peculiar personality who because of his traumatic upbringing deals with emotional events in a very stunted way. And it was misperceived by Shel's parents who essentially started a boulder rolling down off a mountain that was not going to stop."

Neil Tassel
"

"This man here, his wife is killed, and all his dreams came true. All his dreams came true."

Terrence Williams
"

"I did not, could not, would not dream of taking the rock of my life out of the the world. No, I did not."

David Swain
"

"You came off as arrogant, a little hostile, smug. What were you thinking when you were up there? I mean, this is a moment for you to win sympathy from the jurors, to make a connection with them. And how well do you know me? Not well at all. But I know how you're supposed to comport yourself if your life is on the line. So, you would want me to be something I'm not. I am what I am. I think people would want the truth."

Interviewer & David Swain
"

"You claim to love that woman. I would be under the table in a ball if I was in love with that woman and she was dead. I would be inconsolable."

Detective Barb Sharp
"

"He just said there there was an app on his phone that there was messages on that she had found apparently that suggested he was having sex with men and she was going to show everybody. And what did Dave say he did? He snapped. He said he freaked out and did what? He didn't specifically say that what he did, but that he had killed his wife."

Edward Gizmandi

Q&A

Recent Questions

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