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After a hurried pick-up conversation that day, Qiao Zhen had a more intuitive understanding of the jewelry store murder more than ten years ago, and sorted out their daily routines and social relationships. We have a clear idea of the structure of the entire jewelry store inside and outside the store, and the business scope of the surrounding stores. Although so much time has passed, my uncle-in-law still blurts out these things and never forgets them. This emaciated man with sunken eye sockets has not remarried for many years, and her mother told her that "the only ornament in his house is a vase containing the ashes of the mother and daughter", which does not seem to be an exaggeration. His spirit seemed to have been drained by the long and hopeless pursuit of the case.

Many people have asked Qiao Zhen why he gave up the credits he obtained in his original major and would rather spend an extra year studying criminal psychology and trace science. Qiao Zhen always avoided this question.

She thought it was her ex-husband's sister who hired a murderer to bring her shock, but until now, three alternating faces kept coming to her mind - the haggard uncle, the aunt who was shot in the head, and the cousin who died tragically - she realized that the rebellious crime of the good girl was just a fuse, and she already had a knot in her heart that had been in ambush for many years, or her mission as a police officer.

For this answer, they all waited too long, grandma broke her life, mother turned white, father and uncle-in-law consumed the happiness they should seek, and she still didn't grasp her marriage.

It's time for a change, but it's easier said than done.

Qiao Zhen sat in the archive room, and this was the third time she had flipped through the materials in the file. Although this dossier seemed thinner than the other cold cases, she was still unwilling to let go of every line of words, every detail of every picture.

After lunch, Qiao Rao had just walked in, and for the first time, the father and daughter silently looked at the case file together, reverently as if admiring a work of art.

Qiao Zhen watched it for a long time, and she found that her father's focus was on the relationship between the characters and the suspicious list, while she always unconsciously paid more attention to the traces and physical evidence of the data type. Each has its own focus, each has its own strengths, and it can be regarded as learning from each other's strengths.

Regarding the forensic conclusion and the thumbnail of the scene of one of the cars involved in the case, Qiao Zhen obviously showed an extraordinary interest. Not only did they look closely, but they also turned the case file around, observed it from all angles, and even compared it with a measuring stick.

"See what's the sign?" Although Qiao Raogang is no stranger to physical evidence, he didn't see anything unusual in the end.

"Was the evidence of this car ours or theirs at that time?" Qiao Zhen asked worriedly.

"I'll have to ask, it's been so long that maybe some people won't be able to find it. However, what I can be sure of is that this conclusion should not be what we came to it. ”

Qiao Zhen's eyes lit up and dimmed a little, but it could be seen that she still had a glimmer of hope: "Dad, if you can find the staff involved in this link, and if he still has the first-hand information at that time, maybe this case is really a show." ”

Qiao Rao Gang expressed his doubts: "Are you sure that at that time, because of our great attention, they fully cooperated in the later stage in terms of physical evidence and sent their chief technical personnel, so there should be no mistakes, right?" ”

"Dad, it is also possible for an experienced technician to make mistakes, not because he is not experienced enough or not serious enough, but because the situation on the scene is complicated, and even if he has experienced many cases, he may encounter situations that he has never encountered before. Like this. ”

"What's different about the cars in this case? After the incident, the car had already been resold, and the other party was quite cunning, and he poured several hands, and he couldn't find the original family at all. ”

However, only one trace was taken here, indicating that after comparison and screening at that time, it was confirmed that it might be the physical traces of the suspect. In this regard, we still have to trust the intuition and level of the old technicians. ”

Qiao Rao Gang shook his head: "Haven't you always admired numbers and science, but now you have come to tell me what kind of perception?" ”

Qiao Zhen pushed Qiao Rao Gang out: "What I want to verify is precisely the analysis of the traces of the scene in numbers and science, Dad, go quickly, I will wait for your good news." ”

In fact, Qiao Rao Gang had a good idea of who participated in the on-site investigation at that time, but this person left the public security team about ten years ago and jumped out of the system to go into business. Qiao Rao just went through several twists and turns, and personally visited the door to explain the entrustment, and finally on Friday, he brought a calm and relaxed little old man in a casual shirt into the office and called Qiao Zhen.

The man he called "Lao Li" put a laptop on the coffee table, pulled up a history folder, looked up and saw Qiao Zhen walking in, only glanced at it, and gave Qiao Rao a thumbs up, smiling and not saying much.

Qiao Rao Gang didn't seem to care, the smile on his face was full of smiles, and he introduced to Qiao Zhen: "This is your Uncle Li, a fellow senior, the most competent criminal investigation expert in our team and even in the entire city back then." ”

Lao Li added without modesty: "One, one." Now it's probably not even better than Xiao Qiao. ”

Qiao Zhen felt that Lao Li's aura was very consistent with himself, and he had no life, so he greeted him generously: "Uncle Li, with the development of science and technology, the current survey technology is not only unpredictable in terms of crime methods, but even the survey instruments are being updated faster and faster. Even those of us who have been in the past few years sometimes feel that it is too late to learn, let alone you. ”

Uncle Li nodded, opened a set of photos, and motioned for Qiao Zhen to come and take a look. After she sat down, she saw that it was actually the survey team of the car involved, and couldn't help but exclaim: "Uncle Li, have you kept this material for more than ten years?" ”

Qiao Raogang looked happy: "If it weren't for Uncle Li having such good professional habits, I'm afraid that if you want to see these photos, there will be no way to find them." ”

Lao Li waved his hand: "What kind of professional habit is this, this is an occupational disease, obsessive-compulsive disorder, when I see an unclosed case, a questionable case, or a case that has worked hard to solve the twists and turns, I will collect all the relevant information uncontrollably, and I will regularly back up a copy on another computer." No, when Lao Qiao came to me, I just wanted to maintain the data, more than ten years passed too quickly, and several old computers were eliminated, and I almost lost all the data. ”

"Then what kind of case does this case belong to?" Qiao Zhen asked.

Lao Li's face was a little heavy: "It just has all three of them." ”

"So, you also had doubts when you surveyed it?"

"That's right, it's just this question, I haven't solved it yet, you know this feeling, I scratch my heart." Lao Li clutched his chest and sighed, "I just came today to hear, what are the opinions of our top students of the Lao Qiao family?" Maybe it will inspire me. ”

"If I'm not mistaken, the glass of this car is tempered glass?"

"That's right, because of the film, so in the process of escaping, they had an accidental impact but it didn't completely shatter, you see, you can see cracks in this place."

"If we're trying to capture marks on something like broken glass, what do we typically do?" Qiao Zhen seemed to be asking for advice.

Lao Li smiled and said to Qiao Raogang: "Oh, Lao Qiao, the tiger father has no dog girl, and he will test me as soon as he comes up." ”

Qiao Rao was just about to scold her, Lao Li waved his hand to stop his words, and the two seemed to suddenly cut into the state of Xueba's forgetfulness: "In this case, first of all, we must eliminate the interference effect of light and shadow, in addition, the angle of lighting is very important, otherwise it will form a deviation and cause misreading." ”

"It seems that at this point, you have directly ruled out the possibility of a business trip." Qiao Zhen sighed that his business level was still so comfortable after so many years.

"At that time, the other party's conclusion was a fragment of palm prints, because we ruled out many other possibilities, and the corresponding traces found the object, and they all found alibi and no criminal record, and there was basically no mistake."

"Did you take this picture at the time?" Qiao Zhen nodded and asked again.

"I took the photos on the spot, and I didn't come to the color photos, including the conclusion analysis, I participated, but I didn't have the right to speak, after all, it was on the territory of the other party's unfamiliar place at that time."

Qiao Zhen's eyes looked intently at the computer and asked, "So, this is the most likely suspect trace you thought was at that time, but there was no one in the archive to correspond to?" ”