Anatomy room.
The forensic doctor held the nails taken out from Zhao Kai's body and sighed.
The four corpses were dissected by these two forensic doctors. Each of them had a nail driven into their head.
“Is the other party quite superstitious?”
Chen Jiang held the nail and observed it for a long time. What is certain is that the nail hammered into Zhao Kai’s head and the three sentences above about the corpse are inside his head. Staring at them, they are all the same size.
Just ordinary iron nails.
"Who knows what's going on, but there are rumors here that this kind of nails can suppress the souls of the dead, but that's all superstition."
"This matter is still high. Let them study it.”
Chen Jiang and two other forensic doctors from the BZ City Criminal Investigation Detachment were right, Gao Xiang was indeed studying this matter.
In the conference room, Li Donglin, Gao Xiang, Lu Chuan and several other members of the serious crime team were there.
It was already in the afternoon, and the Provincial Technical Identification Center also sent over the trace evidence identification and analysis results.
"Lu Chuan, please report first."
Li Donglin has always paid a high degree of attention to the current survey.
And Lu Chuan has never let him down, playing a major role in the investigation of many cases.
It can be said that the serious crime team has maintained a 100% investigation rate of successful investigation of the entire case, and Lu Chuan is indispensable.
"Yes, Li Chu!"
Lu Chuan's eyes were also red.
After arriving in BZ City yesterday morning, I haven’t had any rest. Until this afternoon, I didn’t sleep for 27 or 8 hours.
Although he was physically exhausted, Lu Chuan was in high spirits.
After receiving the footprint model sent over by Luo Qiang this morning, Lu Chuan conducted a detailed identification analysis and compared it with the half-foot barefoot footprint found on the sink at the crime scene.
Many valuable clues were obtained, and the physical characteristics of the suspect were probably locked.
In addition, after identifying the footprints in the morning, Lu Chuan asked Wang Hao and others from the BZ City Criminal Investigation Detachment to take him to the first three crime scenes.
After the second on-site investigation, some valuable clues were also collected.
Although it has not yet been time to do a complete technical appraisal, Lu Chuan already has some drafts.
“First of all, let me report on the fingerprint identification analysis collected at the crime scene.”
"The murderer should have worn gloves during the entire crime, and was very careful not to leave fingerprints."
This has been expected by the BZ City Criminal Investigation Detachment.
Clear fingerprints were not found at the first three crime scenes, so it is impossible to leave such a flaw at the fourth crime scene.
"Second, we found some blood stains in the sink at the crime scene, and the murderer cleaned it at the sink."
"Some trace evidence was recovered from the sewer. The provincial department has conducted a technical appraisal overnight last night. Let’s take a look at the test results.”
What appeared on the projector were multiple photos and technical appraisal reports.
"The blood stains inside the sink were identified as belonging to the victim Zhao Kai himself."
"The dander and hair found inside identified DNA samples from three people."
"One of them belongs to Zhao Kai himself, the other is his wife Li Guifen, and the third person..." Lu Chuan operated the projector and displayed a separate report.
"The system comparison did not find this person's DNA sample information."
"I asked our colleagues from the BZ City Criminal Investigation Detachment. From what we have learned so far, Zhao Kai and Li Guifen Living alone, there are generally no outsiders in the home.”
Li Donglin and others were very excited after hearing this news.
“Left by the murderer?”
“Very possible!”
"It should be the one left by the murderer. Zhao Kai and Li Guifen's children have never been to this house after celebrating the New Year, that is, after they got married."
"The DNA sample of the third person left behind, then It must be the murderer."
Li Donglin looked at Lu Chuan with burning eyes. Although the DNA sample information has not yet been compared in the system, as long as there is this clue, after the scope of the suspect is determined, , you can lock the suspect!
“Are there any other clues?”
Lu Chuan nodded: “Yes, today I went to the first three crime scenes and carefully inspected the sinks and bathrooms at the scene. Some sample evidence has been obtained and has been sent to the Provincial Technical Identification Center. The results will be returned by tomorrow evening at the latest.”
"If similar DNA sample information can be found at the other three scenes, then we can be sure that the person to whom this DNA sample belongs is the murderer."
"Okay!"
Although Li Donglin is right Lu Chuan had high hopes, but he didn't expect that his side would achieve such a big breakthrough.
But Lu Chuan's report is not over yet: "In addition to this clue, I found half a naked foot footprint on the floor of the sink at the crime scene where Zhao Kai was murdered."
Half a footprint?
Lu Chuan adjusted the projector and what appeared was a pair of slippers.
“After the murderer killed the people at the crime scene, he did not treat the ground. The shoe prints on the ground were all the prints of slippers.”
“This means two clues. First, the murderer and the victim must have known each other, otherwise the other party would not have entered the victim's home wearing slippers."
"Second, when we inspected the crime scene, we did not find any blood stains on the slippers. , so I guess the other party must have cleaned the blood stains on the slippers, and confirmed through reagent testing that the slippers worn by the other party showed blood stains on the projector, which was what Lu Chuan found at the door. slippers.
"The other party is cleaning the slippers on the sink. The other party is actually more cautious. He should clean the slippers one by one so that his footprints will not be imprinted on the ground."
"But When changing the slippers, it was impossible for the other party to keep his feet on the slippers forever. We still found the footprints of half a bare foot."
"In addition, Luo Qiang's people found traces on the wall. A series of footprints were found outside the wall, and I conducted a comparison and identification."
"It can be confirmed that the one outside the wall was indeed left by the murderer, and the other party entered the community by climbing over the wall."< br>
“Through these footprints, it was determined that the male murderer was between 1.81 meters and 1.83 meters tall.”
"The weight is about 75 to 80 kilograms, the age is 40 years old, and the error is no more than 2 years old."
"In addition, the other person's arms are slightly longer than those of normal people."
< br>Lu Chuan adjusted the projection, and what appeared were several photos of dripping blood.
“This is the drip-type blood stain I collected at the crime scene.”
“Generally speaking, the length of a normal person’s arm is about 2/5 of the height, but the drip-type blood stain Based on the blood stains, the height of the opponent’s hanging arm is approximately 85 centimeters.”
"For a person who is about 1.8 meters tall, the height of the hanging arm should be about 80. The other person's arm is longer than that of the average person." (End of Chapter)