The Cold-Blooded Killer with a Deceptive Appearance

The gruesome discovery of body parts disposed of in plastic bags across Jiamuzi City, Heilongjiang Province in September 1994 sent shivers down the spines of the residents. The victims included a man, a woman, and a child, whose tragic fate would soon be connected to a chilling cold-blooded murderess.

Under intense public pressure, the police were tasked with solving the gruesome case within three months. Gathering evidence, they hypothesized that the missing male victim was likely a smoker in his early 30s, measuring approximately 1 meter tall, based on analysis of his yellowed fingernails.

Days after the grim discovery, a news segment aired on local television, featuring a man who had been severely injured in a car accident. The man resembled the hypothesized victim, with a scar on his left wrist. A vigilant neighbor who had observed the missing man return home with his girlfriend, Tu Nga, recognized the scar and provided the crucial lead.

Investigation revealed that the deceased, Dong Dai Khanh, was a 33-year-old judicial police officer living alone after a divorce. Khanh and Nga had met through a matchmaking service. Upon entering Khanh's apartment, horrified officers encountered a macabre scene. Blood spattered the walls, appliances, and furniture, with bloodstains matching Khanh's blood type.

The investigation team pinpointed Tu Nga's girlfriend as the key to unraveling this cold case. They traced her identity to Ma Diem Hong, a 28-year-old divorcee residing in Hoa Xuyen district. In 1993, Hong had divorced her husband due to poverty. She lived alone in a rented house and had remained estranged from her family for half a year.

During the investigation, the police discovered that Khanh had reported the loss of 20,000 yuan from his savings account. They suspected that property theft was the motive for Khanh's murder and that the perpetrator had likely accessed this money.

After days of surveillance, Hong was apprehended as she attempted to withdraw money from a bank. Interrogation revealed a sinister past. Hong had initially moved to the city as a clothes trader. She had entered a relationship with a wealthy man named Vuong, despite his marriage and children.

In a shocking turn of events, Hong witnessed the murder of Vuong by his brother and nephew over a financial dispute in 1993. Notably, the crime had no apparent psychological impact on her. In fact, in 1994, Hong rented a house under a fake name and pretended to be a victim of infidelity, claiming her husband had taken all her money.

Out of compassion, the family renting the house to Hong offered her a room for a discounted rate. Days before the rent was due, Hong complained to the landlord about not receiving her salary. When the landlord expressed concerns about her inability to make the payment, Hong burst into tears and claimed she had no money for holiday groceries. Moved by pity, the family gifted Hong 200 yuan.

While taking out the money, Hong noticed a stack of 100-yuan notes, amounting to at least 5,000 yuan. In a sinister plan, she invited the family for a farewell dinner on January 26, 1995, before they departed for a week-long visit. She spiked their beer and food with sleeping pills, rendering them unconscious.

Hong proceeded to ransack the house, stealing all the available cash. She then brutally attacked and injured the entire family. With the stolen money, Hong purchased a lavish house in the city and enrolled in a matchmaking center under a fake name. Her goal was to target wealthy men and use her charm to gain access to their assets.

Hong's fake persona attracted sympathy from the matchmaking center staff. She soon met Khanh, a divorced man who was unaware of her shady past. Upon moving in with Khanh, Hong learned about his 20,000 yuan savings and meticulously planned his demise.

On June 2, 1995, Hong prepared dinner for Khanh, spiking his beer with sleeping pills. While contemplating how to murder Khanh, she heard a knock on the door. It was one of Khanh's colleagues, searching for him. Hong calmly invited the visitor inside, claiming Khanh was asleep from excessive drinking. Khanh's colleague succumbed to her deception and left quickly.

This unexpected interruption allowed Hong to resume her plan. After murdering Khanh, she used his body parts to create the gruesome scenes in plastic bags discovered throughout the city. The police connected the earlier body parts discovery case to Hong and interrogated her about both crimes.

Initially, Hong denied her involvement, claiming she was falsely accused. Her defense attorney argued that Hong, as a small and frail woman, could not have single-handedly killed a strong man like Khanh. They also questioned the presence of sleeping pills in the victims' bodies, as the doses administered would only cause drowsiness.

However, further investigation revealed suspicious inconsistencies in Hong's testimony. She could not provide coherent details about an alleged accomplice, Vuong, whom she claimed to have murdered. Moreover, Vuong himself was not in the city at the time of the murders.

Ultimately, Hong's guilt was undeniable. She confessed to committing the murders with the help of Vuong, who had confessed to another killing in Hoa Nam district. After a lengthy trial, Ma Diem Hong was sentenced to death, and her sentence was carried out on December 22, 1998. The complex and chilling case of the cold-blooded female assassin remains a grim reminder of the depths of human depravity.

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