Qin Gang tried to run one floor first, swished twice and then ran down, jumped up again, and looked at the time by himself.

"5 seconds, my speed is not at the level that ordinary people can achieve." Qin Gang was a little proud.

"Don't worry, the building here is 30 floors high, I didn't ask you to maintain a constant speed, but I guess you can't maintain a constant speed, this is unscientific, and we can't verify the results we want. In terms of what happened, the thief will try to keep the high speed and escape as fast as possible, without rest in between, until he climbs the wall and gets out, he should have only one thought, that is, hurry up, and you try to do it according to this idea. ”

Li Yi smiled, "Look at your performance." ”

Li Yi asked Qin Gang to wait for the call, and he walked down the fire escape by himself, observing carefully along the way, hoping to find out if the thief would leave any items in the process of leaving.

In the basement, Li Yi was a little hesitant, because it seemed that he could go forward, left, and right, although there were arrows marking the exit, but he was thinking about a question: A person who fled in a panic still had the heart to observe the signs in the area overhead? Perhaps, it is purely according to the first direction of the conditioned reflex to see, running desperately.

Li Yi counted his steps all the way, followed the guidance given to him by the security guard to the wall, and called Qin Gang to start remotely.

He carefully examined the surroundings of the wall, under which were low evergreens, and there were also clumps of sunflowers, and in the middle of the evergreens, there were floor lamps at intervals.

On the wall, there are traces of thieves climbing the wall and stepping on it, which is not particularly obvious, but the location of the footprints can be seen.

Standing in his position, looking at the fence on the other side, there was a small hill that rose up, and a large green forest on the hill was dense and verdant.

Li Yi believes that this is a simple case of burglary and wounding people, but Ms. Lin must have concealed the whole case, what was the secret she concealed, and why she had to conceal it, which he also wanted to know.

When Qin Gang ran over panting, Li Yi was thinking about it.

"Look at the watch, look at the watch, how long, I haven't practiced for a long time, it's a bit like it was back then, no, starting tomorrow, I have to resume training, and I'll be all wasted in two or three years if it goes on like this." Qin Gang gasped for breath.

Li Yi looked at his watch, 7 minutes and 09 seconds, "It's okay, I feel that I can't run at your speed, you run from the entrance or the exit." ”

"Exit." Qin Gang gasped.

"Very good, you walk back slowly, go upstairs to 3001, this time go downstairs and remember to run through the entrance, if you are thirsty, there should be distilled water in the refrigerator of 3001, if you take it, remember to give money."

Qin Gang grimaced helplessly, "Brother, do we want this?" ”

"Didn't you keep saying you were going back to training? Don't start tomorrow, you can do it today, it's a physical test before resuming training, I'm not torturing you. ”

Li Yi waved his hand, "We are doing criminal investigation, and the scene is restored to be realistic, and my mobile phone will ring when it comes." ”

"Okay, I'm a well-cultivated person, and I XX you in my heart, but I'll never say it on my lips." Qin Gang walked back with a blank face.

Qin Gang's second time, 6 minutes and 43 seconds.

"Yes, better than I imagined, and definitely better than me, strongman." Li Yi gave Qin Gang a thumbs up.

"I think it's still up to you, in order to be realistic, you also come to run twice, we pinch the head and the tail, and get the middle result, this is the most scientific method." Qin Gang was holding a bottle of distilled water in his hand.

"Did you give the money?"

"I wish happiness at home and there is no collection code, how can I give it, and the police and the people's family, how can I be embarrassed to accept my money for a bottle of water." Qin Gang grinned.

"There are a few bottles of water in the refrigerator, I don't think I can remember it clearly, whether I wish you a happy person or Ms. Lin, but we have our way of working and attitude, try to avoid the masses gossiping about us, and get to the point." Li Yi handed the notebook to Qin Gang.

Qin Gang took the notebook and saw that it was written:

From the basement exit to the location of the wall climbing point, the number of steps is converted, and the distance around the road to the lake is about 1,000 meters in total. From the entrance of the basement to the location of the wall climbing point, there is no need to detour, and the distance is about 800 meters.

Qin Gang graduated from the police academy two years ago, and has always been led by Li Yi in the team, Qin Gang also thought that Li Yi was only 3 years of police experience, and he was also a junior brother, and after two years, what he admired most was Li Yi's carefulness and truth-seeking.

"Only when you are as careful as a hair can you find the slightest clue in the barrenness and confusion."

This is what Team Liu told Qin Gang, and the model in his words is Li Yi.

"Which time shall we take, entrance or exit?" Qin Gang asked.

"Actually, it doesn't matter, the time difference between you twice, 26 seconds, the distance difference between the two times, 200 meters, this time difference and distance, in the whole process of the crime, can't change the cause and effect." Li Yi retrieved the notebook.

"Think about it again, think back to the preliminary report you made yourself, and pinch the distance we have verified on the spot, the time you ran and sprinted."

Every time Li Yi took Qin Gang to follow up on the case in the past, he always tried to guide Qin Gang to think about details in multiple dimensions, a criminal investigator, thinking should be more than action, this is Li Yi's understanding of this profession.

Qin Gang poured a mouthful of water on his neck, concentrating and thinking carefully.

"With my running performance, although it is not good, if it is at the running speed of ordinary people, it should not reach my level, I think it should be more than 7 minutes anyway. I counted it for 7 minutes first, and in my memory, in the security guard's transcript, Ms. Lin's call for help was made at about 2:43 a.m., and in the security video, the guy who climbed the wall appeared at 2:39 a.m., and there was a time difference of 4 minutes. If Ms. Lin was frightened, flustered, and then emotionally stabilized, she went to find a towel to stop the bleeding briefly, and then called the security guard, the 4-minute time difference was barely reasonable. ”

Qin Gang paused and continued to think about it.

"But according to the calculation of the time I ran down just now, the guy who climbed the wall, he should have grabbed the door from 2:32 or earlier, and ran away with a desperate mentality, so calculated, Ms. Lin's distress call is at least 10 minutes away from the incident, which is a bit too much, what is she waiting for? Waiting for the thief to run away? Running away and then calling for help? ”

Li Yi gave Qin Gang a thumbs up again, "It's in the state, so whether it's 6 minutes or 7 minutes, this time difference is unreasonable." ”

"But why is that cargo so two, running all the way, along the root of the wall, where can't you climb out, you have to run so far to climb out? There's also a camera pointing at the place. ”

"The design of this community, the entrance of the underground garage is facing the lake, the exit is facing the avenue facing the gate, and the community is outside the lake wall is a leisure greenway. And I guess he crawled in from there, and when he escaped, he crawled out from there, and it was reasonable for people to choose their own familiar paths. ”

Li Yi shook the mobile phone in front of Qin Gang's eyes, "There is another point, the mobile phone is at the bedside, Ms. Lin took the mobile phone and walked to the hall to make a call, I opened the mobile phone in the bedroom and saw that it was full of signals." ”