The case of the late Kim Eun-jin, who was brutally murdered after being kidnapped by her ex-boyfriend, will be explored by SBS "I Want to Know That."

On May 12th at around 10:40 a.m., a scream echoed through an APT. complex in Dongtan New Town. A resident, startled by the sound, discovered a woman collapsed and bleeding in the APT. corridor, and the woman's appearance, who appeared to have been attacked with a weapon, was alarming.

"Her hands were bound behind her back, and she was wearing a mask. I wondered where she had been kidnapped from."

- First caller

The woman was found with her hands bound by cable ties, and she was wearing a black cloth bag over her head. It is presumed that after being kidnapped, she desperately tried to escape and was stabbed multiple times with a weapon. Who is the perpetrator who not only kidnapped the woman but also brutally murdered her in broad daylight in the APT. corridor?

The identity of the deceased woman is 32-year-old Kim Eun-jin. The perpetrator was identified as her ex-boyfriend, Mr. Lee, who disappeared after the crime and was found hanging at the house where the two had lived together in the past. What could be the reason that Mr. Lee kidnapped and murdered his girlfriend, Eun-jin, and then took his own life?

"In the end, I couldn't help but ask for help. This is all I can do."

- Lee Jun-ho (pseudonym) letter

However, a letter was discovered on a computer in a small room of the house. The 12-page letter, which appears to have been written about 40 days before the crime, contained requests to stop Eun-jin from engaging in illegal activities while receiving financial support from another man. Is the content of the letter true?

The man implicated in Mr. Lee's letter spoke to the production team and revealed shocking information. He refuted Mr. Lee's claims as absurd, stating that Eun-jin had recorded their conversations for over a year at the risk of her life and released audio files. What hidden truth lies within the chilling and shocking audio that lasts around 23 hours?

This week's SBS "I Want to Know That" will air on Saturday, May 31st, at 11:10 p.m.
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