In 2002, a mother and son in Heilongjiang were brutally killed, leaving only half a bloody fingerprint at the entire crime scene to be traced.
However, after the police sent the evidence to a number of institutions, they only got an answer that "fingerprints have few characteristics and do not meet the conditions for identification", which directly brought the whole case to a standstill.
Until one day five years after the crime, they held the mentality of trying and delivered this incomplete evidence to Choi Do-sik's hands.
Relying on the "trace image processing system" developed by himself, Cui Daozhi controlled the range to 42 people after more than 2 months of investigation.
He then discovered that the fingerprints of one of them closely resembled those at the crime scene.
"Even so, I didn't jump to conclusions."
Choi Dao-shik took his discovery and personally rushed to the location of the suspect, and after resampling and repeated comparisons, the real murderer who had been hiding for 5 years was finally brought to justice.
The extremely delicate detection procedure has long been familiar to Choi Do-sik, and no matter how old the clue is, he can find new discoveries in his hands.
In 2020, he even received a blood fingerprint the size of a peanut grain and vaguely deformed, from 35 years ago.
After 9 days and 9 nights of continuous rotation, Cui Daozhi's blood pressure dropped sharply and fainted directly to the ground, relying on the effect of the heart-saving pill to barely stabilize his mind, fortunately the suspect has been locked.
At this time, Choi Do-shik was 86 years old.
This man who let the traces speak and escort the truth dedicated his life to his beloved country.
Since entering the industry, he has handled more than 7,000 pieces of evidence and participated in more than 1,200 cases, but has never made a single mistake. Even if he has just undergone cataract surgery, as long as the organization needs him, Choi Daozhi will rush to the front line as soon as possible.
01
In the early summer of 1934, Choi Daozhi was born in a Korean family in Jilin.
Due to the war, his childhood was always accompanied by artillery fire and hunger, and his home was full of bugs and rats.
When he was 3 years old, Choi Do-sik's father was bitten by a rat and unfortunately died, and his mother never saw hope in life after three years of hardship, leaving Choi Do-sik, who was only 6 years old at the time, to a distant place.
Since then, the green cornfield has become the nightmare of Cui Daozhi's life.
The orphaned was as hungry as a dry monkey, and he followed his grandfather every day to beg for a living, until the Meihe estuary in Jilin was restored.
With the help of the state, Choi Do-shik not only ate white rice but also entered the university hall, successfully completing elementary school and junior high school.
In order to repay this heavy kindness, Choi Do-shik chose to give up the opportunity to guarantee high school at the age of 17, turned around and joined the barracks, and eventually became a Korean translator.
During his studies, a copy of "Lovely China" sent by the old class leader made him believe even more.
After several applications, Choi was finally approved to join the party in December 1955, and that day became the most important day of his life.
After that, he was transferred to the Public Security Department of Heilongjiang Province within two years, and from the military barracks to the police barracks, what changed was his identity, and what remained unchanged was his vibrant patriotic heart.
It was also from this time that Choi Do-shik began to contact criminal investigation and found that he had an excellent advantage in clue investigation, and he was out of control ever since.
Not only became China's chief ballistic trace identification expert, but also won the "July 1 Medal", which represents the highest honor.
At that time, Choi Do-shik was young, but he already knew that the firm faith and original intention in his heart would never change.
02
After entering the public security system, Cui Daozhi got a broken telephone line for the first time he contacted the case.
This evidence had already been concluded at the time, but after Choi Do-sik's careful observation, he had doubts about the statement written on the identification letter that it was "cut short by pliers".
Because although the surface of this fracture looks smooth, once it is placed under the microscope, small lines that are 20 times thinner than a hair are revealed.
In the end, he ventured to guess that the phone line had been cut by scissors.
Relevant personnel immediately locked up a suspect based on the identification clues provided by Choi Do-sik, and indeed found a pair of scissors from the other party's home.
Are the scissors that can be searched really the same as those used by criminals?
In order to get the answer, Cui Daozhi repeatedly cut the lead sheet in front of the microscope, and once again compared the thickness, interval, and height between the lines, and the torment of five days was exchanged for the confirmation of important evidence.
And while the murderer was arrested, it also made Choi Do-shik famous in the first battle.
Careful, let Cui Daozhi, who was involved in the case for the first time, emerge, but what made him go further and further on this road was persistence.
There was a criminal case in which the bullet mark identification approached Choi Do-sik, but his determination was directly questioned by higher-level experts.
In order to prove that he was right, Cui Daozhi directly picked up the gun, fired more than 3,000 rounds in 16 days, and then took a photo of each bullet mark.
From the first to the hundredth, from the hundredth to the third thousand, observe the nuances between each trace and compare the differences in each photo.
He finally corrected his identification results and said the golden sentence that is still widely circulated today.
"There are no two hands in the world that can leave the same fingerprints, and no two guns that can leave the same bullet marks."
By this time he had become the nemesis of all the evidence that was difficult to identify for various reasons, but his body also grew old with the passage of time.
By the time he retired in 1995, Choi had been diagnosed with irregular heartbeats, and he always had heart-saving pills in his bag, and even doctors advised him to rest.
However, this year, the number of ballistics-related cases across the country continued to increase, and Choi Do-sik, who has retired, has never been able to put down his work.
03
After five years of painstaking research, Choi finally invented a technology to extract rifling traces of warheads from special aluminum foil film, which was patented like another bullet mark flattening device.
The "Warhead Rifling Trace Automatic Identification System" developed by Cui Daozhi based on these two technologies passed the expert appraisal in 2001.
The capacity of this system has made millions of dollars of equipment in developed countries become decorations.
In those years, there were many robberies of money trucks in a certain place, which had an extremely bad impact on the whole society.
At that time, because the technology was not mature enough, it was difficult to lock the whereabouts of the suspect, but when this group of arrogant people committed the crime again, they left a broken bullet hole and a worn military coat at the scene.
After learning this, Cui Daozhi hurriedly rushed to the scene, and through the shape of the bullet holes inside and outside the wall, he not only quickly judged the real shooting direction of the bandits, but also calculated the height of the criminals and the height of the shooting according to the height of the bullet holes to the ground.
Later, he not only judged that the suspect was using a weapon through a slight wear mark under the collar of the military coat.
With these clues, the relevant personnel immediately had the direction to track, and soon arrested the suspect, and the height of the mastermind was exactly the same as Choi Do-sik's prediction!
Choi Do-shik not only made significant contributions to the identification of ballistic marks, but he was also the first person to complete the "same identification of human nails" and "the same identification of tooth marks".
His various studies pushed forward the criminal investigation technology on the mainland at that time.
04
Choi Do-sik's contribution to the country is admirable.
"The organization has put a lot of energy and money into me, and I feel that I have to give back to the organization"
Therefore, in order to save money for the country, Choi Do-shik will refuse to take the plane without delaying the task, and will usually refuse to be picked up by anyone, and use the subway and bus to travel like an ordinary person every day.
In the face of praise from the media and netizens, Choi Do-shik was particularly modest.
"If I've made any achievements over the years, it's all the result of organizational education."
Choi's work may seem simple and repetitive, but it is dangerous.
One of his most challenging identifications occurred at the age of 84.
That time, the strap of his backpack containing the laptop was broken, and an iron card on the strap was shot directly into his left eye, and an L-shaped wound was cut on the white eye on the spot.
Coupled with the fact that he had mild cataracts in his right eye, the pain in his eyes made his job more difficult.
Everyone around him advised him to rest, but Choi Do-shik refused to retreat, and by the time his son found out, Choi Do-shik had been working for three days and three nights in a row.
When his son opened his eyelids, the wound had reached the point where he couldn't bear to look at it directly, and finally Cui Daozhi went to the hospital at his son's insistence and received 4 stitches.
Another time, he received a task just days after cataract surgery.
Choi Do-shik not only did not delay a day, but did not even mention his illness, until his colleagues found out that his eyes kept dripping tears.
The public security comrades looked guilty, but Cui Daozhi disagreed.
"It's okay, don't think about it."
In order to get closer to the state at the time of the crime, he often lay on the ground and squeezed by the wall as a victim when he was over ninety, and the young man couldn't bear to see it.
Choi Do-shik felt that everything was worth it.
"It's all about evidence."
Cui Lao's life is full of glory, his contribution to the country is to write a book, he is a "male god" that everyone admires, but he is not a qualified husband and father.
05
After Choi Do-shik married his wife Kim Ok-yi, he spent more than two hundred days a year on business, unable to accompany his wife or take care of his three young children.
He was busy, and it was not until after retirement that he had time to take a photo with his wife.
In the early years, the sons couldn't see the point of him lying on the ground pretending to be a victim, and his wife couldn't figure out what he was busy with every day.
And now, Cui Daozhi's three children have become people's policemen and shine in their respective posts, and his wife forgets everything because of Alzheimer's disease, but she always remembers to go to the public security department to conduct trace experiments, and has never forgotten Cui Daozhi's name and mission.
Last year, 87-year-old Choi Do-shik was awarded the highest honor, the "Order of July Day".
He clearly knows that human life is not infinite, and there is not much time left for himself, and what he wants to do most is always to leave more things to the world so that those who come after him can have a record.
He has dedicated his life to the mainland trace experiment, and he is worthy of the word hero.
Only such a person is worthy of the title of "national male god", and only such deeds should become popular on the Internet.
Author: buckwheat tea tea