The investigation began, the first step, searched Chen Hong's office, in addition to the gold and silver jewelry and bags found by Cao Rui before, in a locked drawer found a house title certificate, the owner is Chen Hong, and Chen Hong's husband knows nothing about it, so the address on the property certificate for a long time, a group of people found the house; this is a two-bedroom apartment, the house is very new, the decoration is not long, the house is very clean, spotless, household appliances, furniture is readily available, but the living room does not have a TV, Obviously, this is just the place where Chen Hong and Wu Zhiyuan live, just overnight, not like the place where they often live; the criminal investigators began to get busy, hoping to find clues here; the corners of the horns, the furniture gaps, even the sewer pipes were not spared, to see if there were washed corpses or blood stains through the sewer pipes; but the inside of the house was indeed too clean, if it was a murder scene, no matter how to clean, there would be evidence, but nothing could be found in this room, there was no trace of blood, no trace of fighting... Sometimes in order to cover up the murder scene, even the walls will be repainted, but the walls of this room are obviously not repainted; there is no clue, which can only prove that this is the place where Chen Hong and Wu Zhiyuan met; and Wu Zhiyuan did not deny this house, admitting that he paid for Chen Hong to buy this house, the purpose is not only to block Chen Hong's mouth, let her not make trouble, but also provide them with a good place to meet, killing two birds with one stone.
The administrative staff visited the surrounding neighbors, and everyone's impression of Chen Hong and Wu Zhiyuan was only seen, and the last time they saw it was on January 23, 2006, which means that Chen Hong did not return to this house after 23 days;
From January 25 to 26, 2006, Wu Zhiyuan went home directly after work on the 25th, did not go out all night, knew that every day before the Spring Festival holiday was to go to work on time, leave work, go home, two points and one line; Liu Xiaoming and Wu Zhiyuan, there is no other movement; and Cao Rui went to Chen Hong's office on the 27th except for normal commuting, and there was nothing wrong with it;
Since the house and the time point can not find any clues, they can only find their mobile phone positioning through technical means, Chen Hong's mobile phone positioning signal shows that the last place she appeared is a suburban paint factory, and Wu Zhiyuan, Liu Xiaoming and Cao Rui's mobile phone signal has also been to the same place, this clue is very important, a group of people came to this suburban paint factory, which is a courtyard of rural houses into a simple paint factory, it looks abandoned, and there is no normal production, the environment is very poor, the location is also very biased, There are no residents around; the production process of the rural paint factory is very simple, there is almost no production equipment, that is, the lime, glue, pigment and water are mixed into the barrels made of cardboard in a certain proportion, and they can be sold and sold; a row of rain shelters is set up by the south wall, and some paint finished products and lime and other raw materials are piled up, the east side is a large iron gate, the west side is the production workshop, and the north side of the yard is built with seven or eight houses, which are kitchens, workers' dormitories, and the innermost is the office; the conscientiousness of handling the case tells everyone, This is a great place to kill people and destroy corpses;
Technicians arrived at the paint factory, carefully surveyed; the walls of the north kitchen were smoked brown-black, the back few were workers' dormitories, each dormitory had a large iron barrel, which was full of tattered clothes, smelly and baked, but there was no Chen Hong's clothes inside; the innermost was the same office inside and outside, there was a row of sliding aluminum alloy windows on the partition wall between the inside and outside, the rooms of the office were newly renovated, the floor tiles were all replaced, the walls were also painted, why did this abandoned paint factory only decorate these two offices? The investigators looked at each other: this should be the scene of the murder!