Su Mian pushed open the door and saw that Han Chen had woken up and was sitting on the sofa with a coat on and her laptop on her lap.
"Why don't you sleep more?" she asked, sitting down next to him.
He picked up the teacup and took a sip. The tea was brought from his house, and the fragrance was fragrant.
"Have you had a good time chatting?" The voice was neither salty nor dull.
Su Mian: "...Pfft." This vinegar jar. He stretched out his hand to hug his neck and kissed him for a while, which was considered to please. However, his expression was always indifferent. It was obvious that the young master had lost his temper again, and Su Mian still needed to work hard.
Su Mian, who is so clever, immediately stared at the computer screen and changed the subject: "Are you watching that video?" The moon, and a very faint ray of light projected from nowhere.
"Yeah." He replied, putting his arms around her waist and looking at the screen together, "What did you find before?"
Su Mian shook her head, "If you can find anything, there is nothing in the picture. There are alleys like this, and the three of them certainly won't leave any clues."
Han Chen was noncommittal, let go of her, leaned forward slightly, and adjusted the picture back and forth with his fingers, watching very intently. The man who works hard is the most handsome, so Su Mian leaned into his arms and looked up at his profile: "Don't tell me you really found out."
He looked down at her, his eyes dim: "What if there is? Will you be obedient from now on?"
Where is this going? Still jealous
But Su Mian has been planted in his hands a few times, can he still learn to be smart? Immediately hit haha: "You're right, haven't I always been very obedient? I'm about to become your Zhou Xiaozhuan and Wan Mun's little follower! Hurry up and talk, what did you find?"
Obviously such a dazzling beauty, she is always so slick that she is speechless. Han Chen looked at her, smiled, turned his head and continued to stare at the screen, but his hand slid on her waist again and hugged her full.
"In the picture, there are three clues," he said.
"Huh?" For the first time, Su Mian felt that her IQ was not enough. Three more
Han Chen's finger lightly tapped three times on the screen: "Moon, light and sound."
"The moon..." Su Mian looked at the crescent moon in the picture and felt an epiphany. "Could it be based on the curvature of the moon to guess which day of the month it is?"
Han Chen stared at the screen, his eyes were lightly closed, and his expression revealed a bit of aloof indifference: "What's the use of that? It is based on the height and curvature of the moon in the sky to infer what time of day it is."
Su Mian opened her eyes wide, and finally raised her hand and snapped her fingers beautifully, "Yes!" Although Han Chen only said one thing, once her thoughts were opened, she was faintly excited. The seemingly bland picture, Han Chen's eyes are so poisonous, and he draws such an accurate conclusion.
At this time, Han Chen picked up her colorful soft leather notebook from the coffee table in front of him. Only then did Su Mian notice that the pages he opened were full of his beautiful and powerful handwriting, full of numbers and formulas, and he even drew a simple sketch of trigonometric functions.
Hmm, I don't understand.
"It was the day before yesterday, from 3 to 3:30 in the middle of the night," he said.
"Enen!" Su Mian was so full of admiration, looking at the way he was wiping the pen between his fingers, the more he looked, the more handsome he became. She would bet that if Han Chen didn't become a criminal police officer, he would definitely be an amazingly handsome and cold-faced math professor.
"Then what?" she asked.
A faint smile flashed in his eyes: "Then there are the lights. The rest of the alley is completely dark, and there is only this light in the picture. At three o'clock in the middle of the night, there are very few places with lights on." His fingers slid on the computer, Zoom in on the picture, and the faint light on the ground also zooms in.
He continued: "From the length of the clown's shadow and his height, the distance and height of the lamp to him can be calculated. The calculated distance is 20 meters, and the height of the lamp is 15 meters. The lamp is all white, The gloss is uniform, there is no pattern, and it does not project the outline of other furnishings. Therefore, it is not a lamp in the household of the residents, but a street lamp in an empty space.”
Su Mian was stunned for a moment, and then heard him say calmly, "I checked, and last year the street lamp posts in this city underwent a unified renovation, and there are only two heights: 8 meters and 12 meters, There is no 15 meters. In addition to lamp posts, street lights will also be installed in a place - under the eaves of the building adjacent to the road, to illuminate passersby. That is to say, there is a five-story building 20 meters away from where the clown stands. There is a white light, bright all night."
"Fuck!" Su Mian blurted out, crazy, crazy, crazy! He actually asked him to deduce the salient features of the place, the length and gloss of the shadows were even, so it was a street lamp, or it was an illuminated street lamp installed at a high place in the building - such details were all pulled out by him, and the logic was impeccable.
According to this condition, the criminal police do not need to search for a needle in a haystack at all, and can quickly find this location. What will be the result of finding out? Who knows, maybe it's very close to their old lair, maybe at least some of their whereabouts can be found. - After all, Han Chen said that criminals only commit crimes in a place they feel comfortable with. When they posted this video, they must think that place is very safe.
Only now, they must have never imagined that it was this video that looked absolutely safe and dazzling, that Han Chen had found such an important clue!
She opened her arms and wrapped her arms around Han Chen's lean waist: "How can you be so capable! You are simply a weirdo!"
Her words made Han Chen frown slightly, but the admiration at the corners of her brows and eyes was naked. This made Han Chen smile, and there seemed to be some kind of soft and comfortable aura wrapped around his chest. He leaned back, put his arms around her, and tapped his hand on the table: "As for the sound, we still need to go to the forensic department to analyze it carefully. However, it is initially judged that there are two sounds with relatively high resolution. One is a and r. Laughter. Using instruments to analyze the voiceprints carefully, you can calculate the distance that their laughter reaches the wall on this side, so as to infer the specific shape of the open space they are standing on; the second is the sound of traffic on the road, you can try to calculate The distance from the road to where they are standing. That way, brothers can find the place more accurately.”
According to the voiceprint analysis, Su Mian had only heard about it. But it can also be understood: the ripple of the sound, the speed, and the rebound of what it encounters, so as to determine the shape of the obstacle. He didn't expect Han Chen to even understand this. With these three clues, are you afraid that you won't be able to find their meeting place
—
At noon the next day, good news finally came, and a major breakthrough was made!
According to Han Chen's reasoning conclusion, after several hours of unremitting efforts, the detectives really found the place exactly. A wide-ranging search begins. Moreover, after mobilizing all the surveillance videos from the surrounding area and from 3:00 to 3:30 the night before, Zhou Xiaozhuan successfully found a suspect car.
The surveillance screen was from 3:40-3:41, and the location was on the side of the road about 300 meters away from the alley. The surveillance was captured by a surveillance camera outside the bank by the roadside.
At that time, there was no one on this lonely road at all.
Then, three men came out of the alley. One of them, wearing a clown costume, looks like L. Because of the dim light, they still couldn't see their faces. And they kept their heads down.
l got into the driver's seat. a and r got into the back seat. The whole process is fast and silent. It was a common black car in the city, and soon, the vehicle started and disappeared. The surveillance camera clearly captured the license plate number: "ka7xxxx52".
"The criminals are likely to use fake license plates, but they haven't realized that the car has been photographed, so they may continue to use it." Han Chen ordered coldly, "Immediately search the city for this car."