Profiler 3: Crime Ends

"Two people,? No way?!"

Kevin said: "However, the witnesses near the victim saw only one person every time. The traces and footprints at the scene also showed that? It was committed by one person. Could it be a gang? Two people took turns to commit the crime?!"

Jiao Yang said: "But the witnesses basically didn't see the murderer's appearance clearly. The surviving victims described the murderer's appearance? It is also very broad. Features like brown hair and blue eyes? It is too much for white people. too much.

"You're right."

Kevin turned to Lu Yuanli and said, "But if Professor Lu is like this, the profiling will have to be done again, right?"

Lu Yuanli said: "That's right,? That's why I also find it very strange that I haven't given you a profile. There are several doubts in this.

First, as we have just said, the murderer was very cautious and did not leave any fingerprints, hair, or body fluids at the scene.However, according to the latest evidence, he seems to eat food from the victim's home after killing, so it is very likely that DNA will be left behind.In several cases, the police were in the victim's home and found footprints left by the murderer everywhere.

Second, many victims received phone calls from the murderer after their accident. The man on the phone had a low voice and insulted them with vicious and dirty voices.There was also a man who called the police station in Saramento and asked the police to arrest him.Two of these calls were clearly recorded, which also allowed the police to grasp the voice of the suspected murderer.These performances are contradictory. "

Kevin thought for a while and said: "In this case, I will apply for the cooperation of the police from all over the country to re-examine the crime scene at that time. See if I can find the DNA left by the murderer at the scene and compare it with the evidence found by Jiao Yang Right. However, there may be nothing to be found in the few cases three years ago, we will try our best!"

"about this point,?"

Lu Yuanli said: "I think we can dig further into the murderer's pattern of committing the crime. For example, the location of the crime was first Saramento, and then transferred from Saramento to Southern California. Along the way, Although the murderers are committing crimes continuously, there is only one case in each city along the route. Saramento and Irvine have already had two or more cases.

It seems understandable that the murderer lived in these two places.So what happened three years ago that brought the killer from Sacramento to Irvine?Is it because he has committed too many crimes in Saramento and has been targeted by the local police, so he is not allowed to go into exile here, or is there another reason?At the same time, if the murderer's identity as a military police officer is true, then 1 to 3 months may refer to the time when he served in the army and went out on vacation.

Also, in the two cases where the murderer started, it was just QJ. Why did the murderer suddenly kill a young couple?Did something special happen during this period?For example, negative things such as unemployment and divorce can be used as labels to further screen out key suspects for us. "

"This idea is great!"

Kevin said excitedly: "Besides, if the murderer really has military or police experience, he may also leave a DNA record due to accidents such as injuries and illnesses on duty!"

"Don't get too excited. After all, I'm only guessing about the murderer's identity. Maybe he's just a military fan who likes to exercise."

Lu Yuanli said: "However, now that we have found the DNA of a suspected murderer, although the comparison has not been successful, I don't think we can easily let go of this biggest clue. A few years ago, we used genetic technology to find old cases. The case of the real murderer. I suggest that we find more experts in DNA technology to identify the murderer as soon as possible by analyzing the DNA genetic map!"

There are several privately established DNA databases in the United States.If the suspect's DNA is unsuccessfully compared with the existing criminal database, it is theoretically possible to seek help from a private DNA database.Try your luck to see if there is any DNA data collected from the murderer.Even if not, you can still do the reverse work of finding the murderer's close relatives and analyzing the blood relationship.

This work is complicated and trivial, and requires the cooperation of a team of professionals, which is difficult for the police to complete independently.

That's why Lu Yuanli suggested looking for top appraisers in the society and inviting them to become part-time experts for the police.

The case has been delayed for too long, and the murderer has resumed intensive crimes.He has killed ten people, and the police have been facing enormous social pressure.Kevin thought it might as well give it a try.

Kevin said: "I will ask my superiors to hire several DNA experts to join our task force."

"Now there's another direction."

Lu Yuanli said: "That is to ask audio experts to analyze the two recordings currently in the hands of the police. To try to confirm whether the murderer is the same person. Or is the owner of the two audio recordings the same?"

Kevin said, "What's the difference between the two?"

Lu Yuanli said: "The victim's state at the scene was very chaotic and terrified. I don't think he could clearly recognize the murderer's voice 100%. So there may be other people playing tricks, or the possibility of a division of labor between the murderers."

Kevin said: "Our expert team includes DNA and audio identification experts. But as far as I know, the latter is difficult to guarantee accuracy."

Just like fingerprints, or other characteristics, in theory, everyone is unique in audio pitch, scale timbre, and speaking habits, which are called voiceprints.However, in court, audio appraisal experts are recruited, generally hoping that they can improve the quality of the recording, identify the source of the speaker's voice and the authenticity of the audio, that is, whether there is splicing and transcription, or provide an explanation for the recording.

However, an individual's voiceprint is both relatively stable and variable, and it is not absolute and immutable.For example, certain changes may come from psychology, physiology, pathology, simulation, camouflage, etc., and are also disturbed by the environment at that time.It is extremely difficult to accurately identify, especially on very short two pieces of audio.

"Let's try it first."

Lu Yuanli said: "I think we have more and more clues in this case, especially in a small place like Irvine with a population of only about 30. Combined with the other profiles mentioned earlier, compared to other cities For me, it is relatively easy to find this person.”

"It is!"

Kevin was stunned when he said that, "Typical Caucasian looks, very strong body, with military and police experience, from Saramento. Let's go to the local army and police system to check first, maybe we can find some A suspect! At that time, we will ask Professor Lu to analyze and rule it out for us."

On the way back, Jiao Yang asked Lu Yuanli, "What do you think is the possibility of two murderers?"

"Your question, it is better to say that there are several possible scenarios for the profile currently displayed."

Lu Yuanli said: "If the murderer really called the police station and said, you can't catch me. It means that he also has the tendency to challenge the judicial system and the social order system. Compared with male victims, he is more cruel to women, It can be deduced that he lost one of his parents when he was young, or had a family misfortune, or was abused when he was a teenager. And calling the female victim, threatening, or QJ, killing, represents a strong desire to dominate. It means that maybe he I have been betrayed or discriminated against and ridiculed by women, leaving deep psychological trauma."

Jiao Yang whistled unconsciously, "Look, people like me are more likely to be confident and strong psychologically, and won't have so many psychological problems!"

Lu Yuanli gave him a blank look, and said: "Wake up, think about the average data of Chinese men, those below the average, they don't all feel inferior to kill QJ."

"That is."

Jiao Yang said with a smile: "Our Chinese men are usually ordinary and confident."

Lu Yuanli couldn't help laughing and said, "So you are already very humble, right?"

"That's not it."

Jiao Yang stretched out his hand to hold his hand and said, "In order to prevent me from feeling inferior because of being abandoned, you should try to increase the frequency of use!"

When they got back to the villa, the two of them didn't bother to cook any more, so they went directly to Juanzi's shop for dinner.

They had just reached the door of the shop when they heard someone call him, "Hugo!"

As soon as Jiao Yang turned his head, he saw a handsome boy who looked eighteen or nineteen years old standing opposite him, blinking mischievously at him.

Jiao Yang paused before recognizing, "Catherine? Why did you cut your hair?"

There is still half a sentence he didn't say, why cut it so short, just like a boy.But coupled with Catherine's exquisite and graceful facial features, there is another peculiar charm that is indistinguishable between male and female. It seems that she is more eye-catching and attractive than when she has long hair.

Catherine smiled and said, "I signed up for the post-training group. Before the summer school starts, I'm going to participate in military training!"

"This is amazing!"

Jiao Yang also smiled and said, "If you are told to cry by the instructor, you can call me."

Unlike in China, except for military academies such as West Point, universities in country M do not require military training.Freshmen and sophomores are only electives.But the third and fourth grades can sign up for the post-training group, that is, the reserve army training camp.Students who perform well in the military training process can directly enlist in the army after graduating from college.Therefore, relatively speaking, the training courses should be more rigorous and closer to the requirements of real troops.

"You look down on people less!"

Catherine clenched her fist and said, "I will definitely graduate as an outstanding graduate!"

Jiao Yang said: "That's good, let's have dinner together, let's celebrate you in advance."

The three of them walked into the store together, and sure enough, several boys who were eating were paying attention to Catherine frequently.Another boy whistled recklessly and exclaimed, "Hey baby, you're so hot!"

Catherine was a little embarrassed, and quickly dragged Jiao Yang into the private room together.

Juanzi quickly entered the private room with the recipe and greeted Catherine.

Seeing that they looked familiar, Jiao Yang ordered food, and when Juanzi went down to prepare, he asked, "Do you often eat here too?"

Catherine smiled a little embarrassedly, "No, I have worked here before."

Lu Yuanli asked, "Are you in the third grade now? Why do you suddenly want to participate in military training?"

Jiao Yang smiled and said, "Isn't it true that you really want to join the army after graduation?!"