I believe many small partners are not clear about the answers and the truth of the crime master's criticism. Next, Xiaobian will introduce the answers and the truth of the crime master's criticism for everyone. Interested small partners can learn about it.

Crimaster crime master's answer

"target" answer:

Tommy (secretary)

"target" analysis:

On the afternoon of January 9th, the police found through Tommy's remittance records that Li Meng had remitted 12, yuan to an anonymous account three days before the crime. After investigation, the account was an overseas account in Chen Mingming. The police became suspicious of this, and immediately went to Room 42 where Tommy lived. Under the police's surprise interrogation, Tommy could not explain the relevant evidence and behavior, and finally confessed his criminal facts, and gave up the facts of Chen Mingming's cooperation and the disciplinary behavior of inducing Wang Xiang to detain Lin Jiayun's paper to help his cousin Zhang Yixian.

methyl methacrylate

C5H82, an organic compound. It is an important chemical raw material and a monomer for producing acrylic glass (PMMA). Flammable, with strong pungent smell, it produces a lot of black smoke after burning.

acrylic glass (PMMA) is a plastic polymer material with good toughness, transparency, chemical stability and weather resistance.

Key points in solving a case: 1. Can you act quickly in the dark? 2. Whether there is time to enter the site and carry out actions.

Thought of solving the case:

The precondition is that, according to the informant's confession and the circumstances of the crime, the attacker ambushed in the unsupervised and dark stairwell on the first floor, and committed the crime by attacking the victim from behind with a suspected small knife-like instrument, and then fled the crime scene.

1. Although Zhang Yixian owns acrylic glass material and has the conditions and time to manufacture the murder weapon, according to the neighbor's confession, he was in the room all the time at the time of the crime, so he ruled it out; The exclusion clue is: neighbor's confession.

2. Chen Mingming has the time to commit crimes, but according to the confession of his colleague in the clue, the vitamin AD soft capsule in his carry-on bag, and the English letters on the case (full name: nightblindness), it is known that he suffers from night blindness and cannot commit crimes in a dark environment. Even if he successfully attacks, he cannot escape quickly through the stairs in the dark, so he is ruled out. According to the clues, we can know that he is an accomplice or a hired murderer. According to night blindness, we can determine that Chen Mingming is an accomplice and has not left the monitoring room, that is, his behavior is to report the movements of the victim Lin Jiayun.

Excluded clues are: cases in clues.

3. Wang Xiang had the motive to kill, but according to the confession of the residents on the 7th floor, Wang Xiang was recorded on the 7th floor at 21:2 p.m., and the victim arrived at Building 2 at 21: 2, and then was attacked, which was inconsistent with the timeline of Wang Xiang.

the exclusion clues are: the main exclusion clues are vlog videos of residents on the 7th floor; Auxiliary exclusion clues: drunken state (according to the confession on the seventh floor, it is known that it is very alcoholic); According to the scene, Lin Jiayun was ambushed in advance, that is, there was no running and sprinting footsteps (if there was a Lin Jia meeting, it would be easier to find the scene), and there was an echo problem in the stairwell, so Lin Jiayun had time to prepare (which was inconsistent with his attacked state); At 21: 23, I received a phone call from Chen Mingming and was abused, which was 3 minutes away from the victim's entry, which was far away from the attack time (that is, Chen Mingming did not inform Wang Xiang Lin Jiayun about the relevant trends).