Episode 56:
“I Didn’t Kill My Son” BUT US Police Made Him a Killer

In the dead of night, a scream tears through a quiet Chicago suburb. "Honey, it's Young-bo! What do we do?" A father finds his twenty-two-year-old son collapsed at the front door, bloody and barely breathing.

By 4:18 a.m., Young-bo was declared dead at the hospital. As his father wept over the loss, police walked up and snapped handcuffs onto his wrists.

The man accused was Hyung Seok Ko — the boy's own father, and a man who had spent thirty years building the American dream from nothing.

An Immigrant's American Dream

Hyung Seok and his wife Eun-Sook had been a teacher and a nurse in South Jeolla Province before immigrating to the US in 1983 with their toddler daughter. They drove school buses and worked laundromats before eventually passing the federal postal exam, building two decades of stable work and, later, a small vending machine business. Their son Young-bo became his father's right hand.

On April 16, 2009, Eun-Sook woke for morning prayer and found the lights on downstairs — lights she was certain she'd turned off. Then she saw the blood. Young-bo had been stabbed six times in the chest, his neck slashed, his skull fractured badly enough that pieces of bone were missing. A deep cut on his left palm looked like a defensive wound.

A Locked House, A Fast Conclusion

Every door and window in the house was locked from the inside, and only the entryway was bloodied — the rest of the home was spotless. Police concluded the killer had to still be inside, and landed on the grieving father standing in front of them. They knew Young-bo had a history of drug use and hallucinations that had strained the family for years, and built a theory: a fight over drugs, a father who snapped.

It was a theory built on nothing. Luminol testing of the entire house — bedrooms, bathroom, basement — turned up no additional blood anywhere. If Hyung Seok had killed his son and cleaned up, there should have been some trace of it. There wasn't. And if Young-bo had fought back hard enough to wound his own attacker's hand, his sixty-year-old, 63-kilogram father should have shown scratches or bruises from a struggle with a much larger 90-kilogram son. He had none. The knife itself didn't match anything missing from the family's kitchen — someone had brought it from outside.

Nine Hours, No Lawyer

None of that stopped the interrogation. Denied his blood pressure and diabetes medication, denied a phone call to anyone but a lawyer whose number he'd have to recite from memory, Hyung Seok was pressured for over nine hours. Illinois law required recorded interrogations for felony cases — so police conducted the real pressure just before and after hitting record.

The "interpreter" was a Korean-American officer with poor Korean, not a certified translator — he couldn't even properly convey Miranda rights, and at one point wrote Young-bo's time of death in the space meant for Hyung Seok's signature. When Hyung Seok recalled once tearfully begging his drug-addicted son, "if you keep acting like this, let's just die together," the officer translated it flatly as "let's die together" — turning a father's desperate plea into what looked like a murder plot. When Hyung Seok, consumed by guilt, said "it's all my fault, I might as well have caused his death," it was logged as a confession: "I killed him." Police also falsely told him his wife had already confessed, and threatened him with years in prison if he didn't do the same.

Final Thoughts

Bail was set at five million dollars — higher than what Illinois typically set for child murderers and serial killers at the time. The family's home wouldn't sell once buyers learned someone had died there, and the Korean consulate turned them away because Hyung Seok was a US citizen. Nine lawyers from a major firm eventually took the case pro bono.

At trial in November 2012, the prosecution sought sixty years — effectively a life sentence for a man in his sixties — resting entirely on a confession obtained through coercion and mistranslation. The defense laid out everything: no injuries on Hyung Seok, an unidentified weapon, a house too clean to match the crime, evidence of someone else's presence in Young-bo's room that police never investigated. After thirteen days, the jury returned a not guilty verdict.

Hyung Seok was cleared after three years and eight months, and later reached a settlement in a civil suit against the police. But clearing his name did nothing to answer the question that mattered most: while investigators spent years trying to make the case fit a grieving father, whoever actually killed Young-bo walked free, and the trail went cold. The case remains unsolved to this day.