"Captain Ouyang, you asked like this earlier, we don't need to make such a big detour. On the afternoon of the twelfth day, we put up the bathroom tiles at No. 101 in Building 10, and the couple at No. 101 were there. I remember that around five o'clock, there was a noise downstairs, and later I heard the sound of a police car. When I asked, I found out that Mr. Liu's family had a murder case, and originally, we also wanted to go downstairs to see, and the good cement was dried without use, so we didn't go downstairs. The owner heard the noise and went downstairs, and before that, the owner and his wife had been watching us put tiles. That afternoon, before seven o'clock, we both stayed at 101, between four and five, and the owner was with both of us. ”

The situation provided by Min Dongshui is basically the same as that provided by Huang Gongqin, after that, Ouyang Ping asked the head of the 101 building to understand the situation, the head of the 101 building is surnamed Mao, the name is Yongquan, and the wife is called Jin Xiurong, the couple confirmed that from 4 to 5 o'clock in the afternoon of January 12 - that is, the period when Mr. Ma's family had an accident, the couple had been staying with Huang and Min The two masters, at that time, they were pasting the tiles of the bathroom, a little more than five o'clock, shouting came from downstairs, and the sound of the police car sounded after a while, The couple went downstairs, and the two masters, Huang and Min, stayed in the room and continued to apply tiles because the cement for the tiles had just been reconciled. At about half past six, Mao Yongquan returned to 101 to discuss the purchase of tiles with the two masters, but Mao Yongquan miscalculated the number of tiles when he bought them. At around seven o'clock, Mao Yongquan and Huang and Min left 101 together.

Mao Yongquan also confirmed that during the decoration period, the couple and the couple, plus Mao Yongquan's mother, one of the three of them was on duty at 101 every day, and they left No. 101 with the master every night, so the two masters have never been out of their sight, and the Mao family did this for three reasons, first, during the decoration period, they temporarily rented a house in the community, so they agreed with Huang and Min that the construction period was two months. In this way, the two masters Huang and Min had to work overtime to meet the deadline. Second, they were worried that the two masters were stealing and stealing materials, and that all the materials were purchased by themselves, and they were worried that the two masters would take advantage of their absence to follow their materials - this was instructed by experienced people to do this (in comparison, Teacher Liu was much more stupid); Third, they didn't hand over the door key to the two masters, so they didn't need it at all, because the Mao family was there every day. On the surface, it is to provide tea and cigarettes and do some service work, but in fact, it is to conduct round-the-clock surveillance.

Facts have proved that Huang Gongqin and Min Dongshui did not have the time to commit crimes.

The investigation of the case once again fell into a situation where we were at a loss, and everyone lost the way forward.

At this time, the time was already January 20, and eight days had passed from the incident to January 20. The longer the time drags on, the more difficult it will be to find clues to the case, and the comrades are anxious. The weather is not beautiful, the temperature is very low, the cold air comes from time to time, and it rains a little from time to time, this kind of cold weather makes people shrink back and feel very uncomfortable.

On the afternoon of January 20th, Ouyang Ping stood alone in the corridor in front of the room and thought about it, there was not much rain in the sky, and the leaves of the sycamore trees fell to the ground one by one under the action of the northwest wind, and there were not many leaves left on the branches.