『True Crime Mastermind』のカバーアート

True Crime Mastermind

True Crime Mastermind

著者： Creator at Obomedia
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True Crime Mastermind — true crime stories for listeners who can't let go of a case. A true crime podcast by OBOMEDIA, built on real events.

Every true crime story in our archive begins with a question no one could answer: an unsolved murder, a cold case reopened decades later, a mysterious death the coroner couldn't explain, a disappearance that never made sense.

Open the crime files with us. Each episode follows the crime investigation from the first call to the trial — how investigators build a murder case, where a police investigation goes cold, and what justice looks like when it arrives late, or never arrives at all. Some episodes hunt a serial killer who hid in plain sight. Others reconstruct a family murder that tore a town apart, or a murder mystery that turned neighbors against each other.

And then there are the missing: a missing person report filed too late; missing persons whose trails went cold within days; a missing woman last seen leaving work; a missing girl whose face was on every screen in the country; a missing man found dead years after he vanished; the missing and murdered whose names deserve to be remembered. We tell every crime story with respect for the victim, for the families, and for those who survived.

From the infamous case the whole world watched to the unsolved case you have never heard of, from classic true crime to dark true crime and disturbing true crime, our true crime reports bring you real crime stories, real murder cases, true murder stories and unsolved mysteries — one true crime case at a time, straight from the OBOMEDIA true crime vault. Because if a killer is still out there, the story is not over.

New episodes every week. Listen ad-free and unlock premium episodes: 14-day free trial at obomedia.com.

© 2026 Created with OBOMEDIA technology. All rights reserved.© 2026 OBOMEDIA Creators ノンフィクション犯罪
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  • Daughter Films Herself Three Days After Killing Her Father

    Daughter Films Herself Three Days After Killing Her Father
    2026/08/07
    Daughter Films Herself Three Days After Killing Her Father

    Five days after Daniel Helseth posted a childhood photo of his daughter, Sierra, his body was found stabbed 70 times and burned in his Las Vegas garage. The last person confirmed to have seen him alive was his 16-year-old daughter. What led to this brutal act, and how did a father's love become entangled in such a horrific crime?

    In this episode, we analyze the complex life of Daniel Helseth, his troubled past, and the events leading up to his murder. We explore the custody battles, disapproved relationships, and a suspicious bank withdrawal that became the first clue in a shocking investigation.

    Case: Daniel Helseth Murder
    Date: April 8, 2021
    Location: Las Vegas, Nevada
    Victim: Daniel Helseth, 45
    Suspect: Sierra Helseth, 16
    Relationship: Father and Daughter

    - Daniel Helseth was found with 70 stab wounds and burns covering 40% of his body.
    - His daughter, Sierra, was the last person confirmed to have seen him alive.
    - $1,300 was withdrawn from Daniel's shared bank account on the day he went missing.
    - Sierra Helseth told a caller her father was in the shower and had broken his phone.
    - Daniel's blue Nissan Altima was seen leaving the area of his house, driven by someone other than him.

    To listen ad-free and access premium episodes, start your 30-day free trial at obomedia.com

    OBOMEDIA presents true crime storiesa true crime podcast built on real cases.

    Every true crime story in our crime files follows the crime investigation from the missing person report to the trial: investigators and police building a murder case, a police investigation gone cold, justice for the victim and those who survived.

    We open the unsolved murder, the cold case reopened decades later, the mysterious death, the disappearance, the serial killer, the family murder, the murder mystery; the missing persons a missing woman, a missing girl, a missing man found dead and the missing and murdered.

    From the infamous case to the unsolved case, from classic true crime to dark true crime and disturbing true crime: true crime reports, real crime stories, real murder cases, true murder stories and unsolved mysteries one true crime case at a time, from the OBOMEDIA true crime vault.

    © 2026 Created with OBOMEDIA technology. All rights reserved. This episode and its content (audio, text and related materials) are the property of their respective creator and are distributed under the OBOMEDIA name on platforms such as Apple Podcasts, Spotify, Amazon Music and Pocket Casts. Reproduction, distribution, editing or commercial use, in whole or in part, without prior written permission is prohibited. For permissions, licensing and business inquirie
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    17 分
  • Girl Shields Her Boyfriend with Her Body as Five Teens Attack

    Girl Shields Her Boyfriend with Her Body as Five Teens Attack
    2026/08/06
    Girl Shields Her Boyfriend with Her Body as Five Teens Attack

    Paramedics arriving at a park found two people beaten beyond recognition, their identities obscured by the brutality of the assault. One victim had spent her last moments shielding the other. What drove this horrific attack in a public park?

    In this episode, we analyze the tragic case of Sophie Lancaster, a young woman who was murdered for her appearance. We explore the events of that night, the motivations of her attackers, and the lasting impact of a crime fueled by intolerance. What happens when visible difference becomes a target?

    Case: Sophie Lancaster
    Date: August 11, 2007
    Location: Stubblylee Park, Lancashire, England
    Victim: Sophie Lancaster, 21 years old
    Cause of Death: Injuries from assault
    Circumstance: Attacked for her appearance

    - Sophie Lancaster was born on November 26, 1986, in Bacup, Lancashire.
    - She and Robert Maltby were attacked by five teenagers in Stubblylee Park.
    - Sophie died on August 13, 2007, two days after the assault.
    - Paramedics could not determine the sex of the victims due to the extent of their injuries.
    - A 15-year-old witness testified that attackers kicked and jumped on Sophie's head.

    To listen ad-free and access premium episodes, start your 30-day free trial at obomedia.com

    OBOMEDIA presents true crime storiesa true crime podcast built on real cases.

    Every true crime story in our crime files follows the crime investigation from the missing person report to the trial: investigators and police building a murder case, a police investigation gone cold, justice for the victim and those who survived.

    We open the unsolved murder, the cold case reopened decades later, the mysterious death, the disappearance, the serial killer, the family murder, the murder mystery; the missing persons a missing woman, a missing girl, a missing man found dead and the missing and murdered.

    From the infamous case to the unsolved case, from classic true crime to dark true crime and disturbing true crime: true crime reports, real crime stories, real murder cases, true murder stories and unsolved mysteries one true crime case at a time, from the OBOMEDIA true crime vault.

    © 2026 Created with OBOMEDIA technology. All rights reserved. This episode and its content (audio, text and related materials) are the property of their respective creator and are distributed under the OBOMEDIA name on platforms such as Apple Podcasts, Spotify, Amazon Music and Pocket Casts. Reproduction, distribution, editing or commercial use, in whole or in part, without prior written permission is prohibited. For permissions, licensing and business inquirie
    続きを読む 一部表示
    18 分
  • Mother and Daughter Stabbed While Police Say They Can't Come

    Mother and Daughter Stabbed While Police Say They Can't Come
    2026/08/05
    Mother and Daughter Stabbed While Police Say They Can't Come

    A phone call ended mid-sentence on a residential street in Solihull, England, as a woman reported, "He's here. I can see him." Moments later, both she and her mother were dead. Despite five emergency calls and a valid court protection order, why did every layer of protection collapse before the killer ever stepped out of the shadows?

    In this episode, we analyze the tragic case of Raneem O'Day and Khaola Saleem, who were murdered despite Raneem's repeated attempts to secure police intervention. We explore the accumulation of warnings and the legal failures that led to a devastating outcome, raising the question of whether the law was there when it was needed most.

    Case: Raneem O'Day and Khaola Saleem
    Location: Solihull, England
    Perpetrator: Janbaz Taran
    Legal Instrument: Non-molestation order
    Date of Order: August 16, 2018

    - Raneem O'Day called emergency services five times on the night of the murders.
    - Raneem had a valid court protection order prohibiting Janbaz Taran from approaching her.
    - Janbaz Taran had another wife and three children in Afghanistan, a fact Raneem discovered in 2017.
    - Taran slept outside Raneem's home for twelve consecutive nights after their separation.
    - On August 16, 2018, a non-molestation order was registered, prohibiting Taran from coming within one hundred meters of Raneem.

    To listen ad-free and access premium episodes, start your 30-day free trial at obomedia.com

    OBOMEDIA presents true crime storiesa true crime podcast built on real cases.

    Every true crime story in our crime files follows the crime investigation from the missing person report to the trial: investigators and police building a murder case, a police investigation gone cold, justice for the victim and those who survived.

    We open the unsolved murder, the cold case reopened decades later, the mysterious death, the disappearance, the serial killer, the family murder, the murder mystery; the missing persons a missing woman, a missing girl, a missing man found dead and the missing and murdered.

    From the infamous case to the unsolved case, from classic true crime to dark true crime and disturbing true crime: true crime reports, real crime stories, real murder cases, true murder stories and unsolved mysteries one true crime case at a time, from the OBOMEDIA true crime vault.

    © 2026 Created with OBOMEDIA technology. All rights reserved. This episode and its content (audio, text and related materials) are the property of their respective creator and are distributed under the OBOMEDIA name on platforms such as Apple Podcasts, Spotify, Amazon Music and Pocket Casts. Reproduction, distribution, editing or commercial use, in whole or in part, without prior written permission is prohibited. For permissions, licensing and business inquirie
    続きを読む 一部表示
    19 分
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