For thirteen years, tragedy followed one suburban New York mother—until the truth finally emerged.

In this chilling episode of Serial Killer Files by Skoob, we uncover the disturbing case of Marybeth Tinning, a woman whose nine children died under mysterious circumstances between 1971 and 1985. Each death was explained away as illness, SIDS, or accident—until one autopsy exposed a horrifying pattern of infanticide.

Through a detailed timeline, psychological analysis, and forensic breakdown, this episode explores how medical blind spots, misplaced trust, and society’s assumptions about motherhood allowed a killer to hide in plain sight for over a decade. We examine the warning signs that were missed, the psychology behind Munchausen syndrome by proxy, and why justice came far too late.

This is not just a story about one woman—but a system that failed nine innocent children.

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In the early 1900s, long before criminal profiling or modern forensics, one killer changed true crime forever. John Frank Hickey — known as The Postcard Killer — didn’t just murder. He wrote letters.

In this chilling episode of Serial Killer Files by Skoob, we uncover the terrifying story of a man who taunted police, tormented grieving families, and mailed detailed confessions of his crimes. From his violent childhood and first calculated murder to the brutal killing of seven-year-old Joey Joseph, Hickey’s postcards revealed a mind driven by control, manipulation, and a disturbing need to be seen.

You’ll hear how investigators tracked him through handwriting analysis, how his own letters sealed his fate, and why this case is considered one of America’s earliest serial killer investigations. Even more disturbing are the unanswered questions — how many victims were there really, and how close did he come to getting away with everything?

Before modern crime labs… before criminal psychology… there was The Postcard Killer.

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Richard Cottingham lived a double life that fooled everyone around him. By day, he was a quiet computer operator, husband, and father in suburban New Jersey. By night, he became one of the most brutal serial killers in American history—known as The Torso Killer.

In this chilling episode of Serial Killer Files by Skoob, host Arthur Morgan takes you deep inside the psychology, methods, and hidden history of Richard Cottingham. From the dark streets of 1970s Times Square to motel rooms across New York and New Jersey, we explore how Cottingham hunted vulnerable women, erased their identities, and evaded justice for decades.

You’ll hear the full story behind the infamous torso murders, the shocking crime scenes, his eventual capture, and the late-life confessions that are still uncovering new victims today. This is a disturbing deep dive into sadistic violence, criminal psychology, and how a monster hid in plain sight for over fifteen years.

Before we dive in, don’t forget—you can access all Skoob shows, bonus content, and exclusive deep-dive episodes on the Skoob App, and through linktr.ee/skoob.ai.

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Belle Gunness was more than a murderer — she was one of the most calculated serial killers in American history. In the early 1900s, this seemingly ordinary farm widow lured lonely men through newspaper love ads, promising marriage and companionship. What they found instead was poison, brutal violence, and unmarked graves beneath her Indiana farm.

In this chilling episode of Serial Killer Files by Skoob, host Arthur Morgan uncovers the full story of Belle Gunness — her suspicious marriages, murdered children, vanished suitors, and the devastating house fire that may have helped her fake her own death. Was Belle killed in the flames… or did America’s most notorious Black Widow escape justice forever?

This deep dive explores the psychology, methods, victims, and enduring mystery behind one of the darkest true crime cases in U.S. history.

Before we dive in, don’t forget — you can access all our shows, bonus content, and exclusive deep-dive episodes on the Skoob App and via linktr.ee/skoob.ai.

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🎧 Tune in for more chilling true crime stories, psychological deep dives, and mysteries that refuse to stay buried.

Before we dive in, don’t forget—you can access all our shows, bonus content, and exclusive deep-dive episodes on the Skoob App, and through our official hub at linktr.ee/skoob.ai.

Richard Biegenwald didn’t kill for money.

He didn’t kill for revenge.

He killed for the thrill.

In this chilling episode of Serial Killer Files by Skoob, host Arthur Morgan takes you deep inside the disturbing life and psychology of Richard Biegenwald, the notorious New Jersey serial killer who murdered simply to feel power, control, and excitement. From a childhood marked by abuse and electroshock therapy to a brutal killing spree along the Jersey Shore, this episode uncovers how a deeply broken system helped create one of America’s most terrifying thrill killers.

We explore the crimes, the victims, the investigation, and the psychological profile of a man who treated human life as disposable—and the warning signs that were tragically missed along the way.

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Tune in for more thought-provoking stories, dark psychology deep dives, and true crime cases that will keep you hooked.

Before we dive in, don’t forget you can access all our shows, bonus content, and exclusive deep-dive episodes on the Skoob App, and through https://linktr.ee/skoob.ai

They looked like the perfect couple — young, beautiful, newly married. But behind the smiles was one of the most disturbing crime sprees in modern history.

In this episode of Serial Killer Files by Skoob, host Arthur Morgan takes you deep inside the horrifying true story of Paul Bernardo and Karla Homolka, infamously known as the Ken and Barbie Killers. From the Scarborough Rapist attacks to the shocking videotapes, police failures, and a plea deal that still enrages the public, this is a chilling deep dive into manipulation, sadism, and systemic failure.

We examine how a missed DNA test cost lives, how Karla Homolka escaped full justice, and why this case continues to haunt Canada and the world. This episode is a raw, unfiltered look at how evil can hide behind charm, beauty, and a picture-perfect marriage.

Follow Serial Killer Files by Skoob on Apple Podcasts and Spotify, and hit subscribe on YouTube for more episodes like this.

Tune in for more thought-provoking stories, deep dives, and conversations that keep you hooked.

Before we dive in, don’t forget—you can access all our shows, bonus content, and exclusive deep-dive episodes on the Skoob App, and through https://linktr.ee/skoob.ai

In this chilling episode of Serial Killer Files by Skoob, host Arthur Morgan uncovers the terrifying true story of Adolfo Constanzo, the Narcosatanist cult leader who fused drug cartels, occult rituals, and human sacrifice into a deadly belief system.

Set against the backdrop of Spring Break 1989, this episode follows the disappearance of Mark Kilroy, an American college student whose murder exposed one of the most disturbing cults in modern history. From Palo Mayombe rituals and cartel protection spells to mass graves and ritual killings near the Texas-Mexico border, this case reveals how belief, fear, and power collided with horrifying consequences.

This deep dive explores the psychology of cult control, the rise of Narcosatanism, and how superstition infiltrated organized crime—ending in betrayal, bloodshed, and the violent downfall of “El Padrino” himself.

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Tune in for more thought-provoking true crime stories, psychological deep dives, and cases that stay with you long after the episode ends.

Charles Manson remains one of the most disturbing figures in American criminal history — not because of what he did with his own hands, but because of what he convinced others to do for him.

In this episode of Serial Killer Files, we examine Charles Manson’s recorded interviews, prison conversations, and televised appearances to understand how he used language, charisma, and psychological manipulation to dominate, confuse, and control the people around him. Rather than focusing on the crimes alone, this episode breaks down how Manson spoke, how he shifted personas, and how he consistently deflected guilt while maintaining power and influence.

Through a psychological lens, we explore Manson’s use of hypnotic speech, moral relativism, non-verbal intimidation, and calculated vulnerability — revealing how a man who rarely committed violence himself became responsible for some of the most infamous murders in American history.

This episode is a deep dive into manipulation, cult psychology, and the uncomfortable truth that evil often doesn’t look insane — it sounds convincing.

Listener discretion advised.