Crimaster crime master is a detective reasoning game that has been particularly popular recently, and the lost sapphire is one of them. Sapphire disappears out of thin air, and thieves leave no trace like ghosts. So who is the murderer behind it? Let's take a look at the sapphire answer about the missing crimaster crime master.

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Answer analysis

Case introduction

At 23: 30 on July 28, 2020, the Municipal Public Security Bureau received a report that one of the five sapphires collected at home was lost and a pair of sapphire earrings were lost (the earrings were found in the reporter's daughter's room). The lost gem is worth about 654.38+ten thousand yuan. After receiving the police, the police attached great importance to it and immediately launched an investigation. But after a preliminary investigation, the inexplicable situation appeared, the sapphire disappeared out of thin air, and the thief left no trace like a ghost. In order to solve the case and find the stolen sapphire as soon as possible, I want to share some clues with detectives.

Criminal suspects: Zou Tianjiao (daughter), Zou (son), Li Mumian (informant), Wang Xi (housekeeper) and Zou Cunguang (husband).

A: Zou (son)

The truth of the case:

After re-examining the clues and other traces at the scene, the police confirmed that the blue droplets on the wall of the sink were copper sulfate solution. Subsequently, copper sulfate solution residue was detected on the sanitary pot and the inner surface of glass in Zou's room. After tracking investigation, the lost sapphire was finally found.

The police found from Zou's confession that he didn't know the true value of these sapphires, but his tone was very positive. By monitoring the vicinity of major jewelry stores in this city, I finally found Zou in front of a jewelry store on July 25th. After verification, Zou sold the stolen sapphire at a low price, and specially gave cash to classmate Wang to help him charge the live broadcast platform account.

Zou, who is in adolescence, is addicted to watching pornographic live broadcasts after the senior high school entrance examination. During this period, he constantly rewarded various anchors. The voice the housekeeper heard was his interaction with the anchors. He is addicted to illusory flattery and calls it Brother Tian. But when he had no money to reward the anchor, some anchors were no longer enthusiastic about him, and he felt endless loss and emptiness. When he found out that his sister went to collection room to steal things on July 16, he conceived a theft plan that he thought was perfect. Zou first asked Wang, the best friend of his few friends, to buy a lot of copper sulfate for him. Then on July 17, 2007, while the housekeeper was cooking, he stole the showcase key, went out in the name of a party, took the copper sulfate home and stole a showcase key (the scratch on the key was the trace left by the key). After returning home, he secretly returned the cleaned key. In the following days, Zou dissolved excessive copper sulfate in water (using the heating and temperature control functions of the incubator) and made large copper sulfate crystals according to a simple preparation method. But at this time, the copper sulfate crystal (blue diamond crystal) made of _ is very different from the real sapphire, and it can't hide people's eyes and ears.

Zou secretly took her sister's polishing strip, nail polish and nail polish remover. Beating and polishing copper sulfate crystal with polishing belt, and evenly coating nail polish on the polished crystal surface can ensure that the crystal is smooth and transparent.

After all the preparations were made, Zou took a sapphire with him on July 25th, and once again sold it to a jewelry store at the price of 1000 yuan on the pretext of going out for a party (because there was no certificate, the origin was unknown, and the purchase price was very low). After getting the money, he handed the cash to his classmate Wang and asked him to help charge it into the live broadcast platform account. In order to prevent the housekeeper who often cleans from finding the lost sapphire, Zou put the copper sulfate crystal in the original position of the sapphire. The housekeeper was not familiar with sapphire and didn't notice that sapphire had been replaced when cleaning.

On July 28th 18:47, Zou got a call from her mother and knew that she would come back early. After a little thought in the room, he found the housekeeper and told her that her mother would come back early and let her clean the house. He came to collection room with the housekeeper to prove that the sapphire was not lost. The housekeeper carefully wiped the glass showcase clean, so there was no trace on it. After the housekeeper cleaned the downstairs, Zou put on gloves, opened the showcase and took away the copper sulfate crystal. Back to the bedroom, first use nail polish remover to remove the nail polish on the crystal surface, and then dissolve these crystals in water again. When the temperature of the solution drops slightly, pour it all into the washbasin of the guest room bathroom, and at the same time throw the configured key into the toilet and wash it away. At this time, the sapphire was in this villa _ disappeared without a trace.

Zou finished all this and went back to the bedroom, quietly waiting for his mother's return. Hearing his parents quarreling downstairs, he walked out of the room slowly and pretended not to know anything.

As for why he chose such a complicated way (making fake sapphire with copper sulfate) for theft, Zou said that no one would doubt him because the fake sapphire made with copper sulfate would not leave any traces in the water.