Attending ex-girlfriend's wedding, arresting the groom's officer on the spot

Chapter 154 Confession
Bloodstain morphology analysis is a very important subject in criminal investigation.

Lu Chuan had studied it when he was in college.

It's just that the knowledge learned at school is relatively shallow, and without practical support, a lot of theoretical knowledge cannot be applied to practice.

In addition, bloodstain morphology analysis often needs some experimental support in the detection of actual cases.

The skill card rewarded to Lu Chuan by the system contains most of the content.

The bloodstain in the shape of a drop can be used to distinguish the amount of bleeding, the height of the bleeding point to the dripping surface and other information according to the size of the shape of the bloodstain.

Combined with blood DNA information extraction, quite a lot of on-site information can be obtained.

For example, the bloodstain discovered by Lu Chuan is relatively regular and circular, with fewer bloodstains and burrs around it.

This shows that the dripping height of the bloodstain is not high, and when the bloodstain drips, both the bleeding point and the landing point are in a relatively static state.

After taking the survey box, Lu Chuan took out a vernier caliper to measure the shape and size of the bloodstain.

"If this bloodstain is not from the deceased, it is likely to be related to the murderer. I will try to analyze it."

For circular dripping bloodstains, the height of the bloodstains can be analyzed by measuring the data of diameter and thickness, and then performing a comparative analysis.

"The drop height...[-] meters."

"Bloodstains fall freely, without deflection..."

For current survey masters, bloodstains are of great significance to reconstructing the scene of the crime.

The shape of a bloodstain can even mark all the action paths of the murderer and the victim at the scene.

The data measurement and calculation were completed soon, and Lu Chuan had to purify the genetic components in the bloodstain.

If the DNA information can be extracted, it will be of great help to the detection of the case.

When Lu Chuan made a discovery, the investigation work of the action team was also going on, and great progress had been made!

Happy Home Community, Neighborhood Committee.

"The Zhang Wei you are talking about is a taxi driver."

"This guy is nice and honest. He is very familiar with us. He is warm-hearted. We have resettlement houses here. We used to be neighbors."

"It's just a son who doesn't worry..."

The aunt of the neighborhood committee is not only very enthusiastic, but also very cooperative with the work of the police.

Zhang Hui made some records while asking.

"Why is his son worried?"

Another aunt in a red down jacket poured Zhang Hui a glass of water: "Hey, what can you worry about? Isn't it just that you don't have a job? How many people in our community have formal jobs?"

"Who hasn't bothered?"

"These two days... Is there anything unusual about Zhang Wei?"

"Unusual...Comrade policeman...Did Zhang Wei do something wrong?"

Aunt obviously wasn't the first time cooperating with the police. After a few questions, she knew something might have happened to Zhang Wei.

However, it should be unlikely.

She also saw Zhang Wei leaving the car this morning.

Zhang Hui waved his hand: "Nothing happened. Something happened at the Folk Street last night. Zhang Wei drove by. We have to investigate according to the regulations."

passing by?

The aunt nodded, her expression relaxed, and if she passed by, it would be fine.

But then his expression became tense again: "Folk Street?"

"I heard...is it broken..."

Before the aunt finished speaking, her face turned pale.

"Auntie, it's okay, our police are here, it's okay!"

All investigations and visits by the criminal police in the handling of the case stipulate that the case cannot be disclosed at will.

However, only those who have actually done the interview work know that if you keep it secret, it means that others will also keep it secret.

Zhang Hui is a veteran in this area, he knows that he can't deny it, but he can't say too much.

"Auntie, tell me about Zhang Wei, has he had anything unusual recently?"

Sure enough, Zhang Hui's words made the aunt calm down a little: "Hey, you guys have to solve the case quickly..."

"Oh, there's nothing unusual about that Zhang Wei. I ran into him this morning and went to send my son on a trip."

"Travel? Did he leave too?"

"I don't know about that. I said hello early in the morning and said to take my son to the airport..."

56 vehicles, 54 vehicles were thoroughly checked in less than an hour.

The remaining two cars, one is Zhang Wei's taxi, which has not been found yet.

Zhang Wei couldn't get through the phone either.

The other one went to Tianzhou City early this morning.

"Contact Tianzhou Criminal Investigation Detachment Immediately, the other party's vehicle is now on the highway, stop him at the exit!"

Judging from the current judgment, it is very likely that the murderer drove a vehicle and dumped the body, so there will be more or less traces in the car.

It is not difficult to check.

"There is also Zhang Wei's taxi, notify the traffic police detachment, and search for it with all your strength!"

In the huge city of Haizhou, it is not easy to find a taxi.

In the TV series, the system that can locate the other party's vehicle by entering the license plate number does not exist in reality.

The road traffic monitoring system of the Haizhou Traffic Police Detachment can display the traffic flow at major intersections in real time.

It can perform touring broadcast and query monitoring on the real-time monitoring of important intersections.

This is already a relatively advanced traffic management system in China.

The so-called input of the license plate number and query information can only find the information of the vehicle registration, as for the location query, it is impossible.

At this time, it showed how much the murder case was taken seriously by the Haizhou Public Security Bureau.

All field traffic police officers are dispatched to cover all major intersections!
"The intersection of Youhao Road and Medical College Road was not found!"

"Women and Children's Road has not been found!"

"The Heavenly Passage has not been discovered!"

In the traffic control command hall, one after another reports gradually sounded.

The traffic police detachment didn't do this kind of thing once or twice.

In the past two years, Zhang Yongzhi, head of the traffic police detachment, even organized similar inspection drills frequently in order to improve the emergency response speed.

Find a car at random, and all the staff are dispatched!
"Report report!"

"The target vehicle was found at the intersection of Qingfeng Road and Youhao Road!"

"At the intersection of Qingfeng Road and Youhao Road, find the target!"

Zhang Yongzhi, who was conducting inspections in the hall, was shocked!
"well!"

"Don't act rashly, don't act rashly!"

"Report the location at any time, and call Qingfeng Road and Youyou Road for monitoring!"

"Notify the Criminal Investigation Detachment and let them arrest people!"

The traffic police detachment is good at finding cars, but it takes professionals to arrest people.

The other party is the suspected murderer of the dismemberment case, who knows if he has a weapon in his hand.

Qin Yong, who got the news, went into battle in person.

Because just now, the Tianzhou City Criminal Investigation Detachment has replied to the news.

There is no problem with cars stopped at highway intersections.

Last night, there were only 56 cars passing through Folk Street.

55 cars are all right, so the possibility of something happening to the remaining one is greatly increased.

What's more, Zhang Wei didn't answer the phone and couldn't contact him, so the suspicion was even bigger!

The arrest was surprisingly smooth.

While waiting for the red light at the intersection of Qingfeng Road and Women's and Children's Road, Ren Qiang and others rushed forward, and the taxi was stuck in the traffic flow and had nowhere to escape.

"what is it call?"

"Zhang... Zhang... Wei."

"Do you know why you were arrested?"

"I know... I... I killed someone..."

(End of this chapter)