A-line sound machine – tell the story of criminal investigation technology itself

Author: Brother Hou

On the evening of April 18, 2020, when I was sitting at the desk in the technical room of the substation, I was discussing with the two forensic doctors on duty, "Jianghu", Guo and Jiang, for the cause of death of the last homicide autopsy, the mobile phone of "Jianghu" rang a rapid ringtone, as a criminal investigation technician who has been doing technical work for many years, I was fully aware of what it meant to ring the mobile phone at this point in time, I looked at the time, and the clock was already pointing to 11 o'clock.

"Suicide? Cut the wrist? ”。

While answering the phone, the "jianghu" muttered in his mouth and inquired about the police at the police station. As a well-trained and experienced technician in actual combat, a detailed understanding of every detail of the grass-roots police station to receive the police is the key to the work, combing out valuable clues in a short period of time from clues and traces, and quickly capturing even a fleeting point of light, often becoming the hope of a breakthrough in the case. Of course, the experience of years of investigating cases has taught us that this hope is comically minimal, and that hope is dashed in one desperate rush after another.

Guo Guo and the two forensic doctors of "Director Jiang" looked at each other and turned their eyes to me in unison, I understood what they meant. For the scene of suicide cases, forensic doctors are going to send police, but the nature of the case is initially examined as suicide, which also means that a stone has fallen to the ground, which is a conditioned reflex formed after long-term forensic work, and the nature of the case often represents the degree of police force and energy investment.

"Identification?" I asked.

"No, the police station brother feedback, no documentation, can not verify." "Jianghu" answered the phone while answering the phone concisely and quickly, "Jiangbin, after drinking, cut your wrist, Red Cross Hospital." ”

"Brother, what do you think?" Guo Guo asked me.

Engaged in technical work for 20 years, how much I have experienced in such a scene, I can not remember, looking at the two little brothers asking eyes, I quickly thought. Capture that glimmer of light in the phone message of the "jianghu" and quickly determine the next step of the work. At the same time, countless question marks hit the forehead. Jiangbin, why did such a standardized hotel not check in and verify the identity of the suicide person? Did the police station check the video of entering the scene and the trajectory of walking? Does the injured person have the ability to answer questions? Is life-threatening? 20 years of work experience tell me that all suicidal people must have a motive for suicide, a fatal disease? mental illness? Emotional disputes? Debt disputes? Net escape? Since the net escape, why is it so blatant and dares to risk exposure to make such crazy moves? Could it be the last madness? Possibilities flashed through my mind.

"Fixed on the spot, extracted on-site blood samples and knives, took pictures of faces, collected blood, DNA testing, warehousing comparison, and notified the police station brothers to carry out visual investigation." As I spoke, I mentally planned to notify the technicians at the DNA lab to prepare for the overnight overtime test.

This night is destined to be another sleepless night.

Director Jiang immediately drove to the scene, and at the same time, Brother Octopus's phone call came in time as expected, and the hoarse voice was anxious, inquiring about the police situation, and agreed to meet Director Jiang at the scene. When the brothers of the police station took pictures on the spot and passed them to the mobile phones of the technicians, the "jianghu" was already skillfully operating the comparison platform in front of the computer, carrying out the comparison work, and everything was busy and orderly.

The injured man, middle-aged, perhaps 50 years old, has a slightly fat face, is in a comatose state after drinking, and the on-site photography does not fully meet the accurate conditions of face comparison, which increases the difficulty of comparison. I looked at the faces of the injured and imagined the various past and tortuous experiences that the injured might have. Why would a man with a red face commit suicide? This question has been bothering me.

Soon after, the police station in the jurisdiction reported a message that the injured person may be a fugitive, but it is not certain. This is like a stimulant, which completely ignites everyone's passion.

"Murder fugitive!" The possibility expanded rapidly in my brain like a balloon, with a sharp increase in adrenaline in my body, and a heartbeat rate that exceeded the doctor's habitual diagnosis of sinus bradycardia during previous years of physical examinations.

As a forensic technician, who can be indifferent to the glimmer of life in a bloody unsolved murder that has happened? The old criminal investigators who chase their dreams with an inseparable plot regretfully leave the post for which they have struggled all their lives, and the young successors of another stubble follow their footsteps and chase the same dream in the dark night, hoping to catch the light. Today, such an opportunity is presented in an unexpected way to the eyes of successors.

Twenty years ago, on an ordinary night, when people were quietly falling into their dreams in the stability of the night, the supper stall on a street in this small mountain town staged a passionate street melee, caused only by casual words between the neighboring tables, that night, the sword and sword shadow, the streets and alleys were filled with impulsive, nowhere to vent the youth hormones, the fight ended in the tragedy of the death of one person, shook the mountain city, and the main culprit was never traced.

The process of criminal police investigation is painful, watching over the suspenseful and even somewhat mysterious investigation stories in the TV series, the public may be addicted, but I pay very little attention, perhaps I am in this mountain and know the hardships of the mountain, for each murder case need to be in awe, only fear of the party to know the other. Forensic technicians are even more so, every physical evidence, every test result, every test data, every corpse sign means the arduous process of stripping away the cocoon, the forgery can be preserved, and all valuable clues are displayed between the square inches of technical analysis, which is the temperament of the unique technical personnel.

On April 19th, the valley rain, the cherries are ripe, and the fall is colorful, which is the time when it is not lukewarm. It was dawn, and the technicians greeted the arrival of the last solar term of spring with a sleepless night.

When "Master Gan", "Everyone's Sister", "Sister Yin" (thanks) carried out face comparison, fingerprints, DNA testing and comparison, and the investigators strengthened the interrogation work, there was a gratifying news, the identity of the suicide was determined, and the results of the twenty years of pursuing the murderer also meant that the twenty years of fugitive life of the main criminal was over, so why not a new beginning? At this point, the question of why I committed suicide that was originally troubled, there were some answers in my heart, and I no longer existed. Justice comes later, but it has to be done.

After the valley rains, spring has come to an end, and the summer of flowers is coming.

April 19, 2020 Valley Rain