One day, Miss A died in a famous hotel. During the autopsy, the police found that Miss A died of poisoning. There is only a bed and a table at the scene.

First, analyze the possibility of suicide and homicide:

The expression of the corpse is in a peaceful state, indicating that Miss A was unconsciously poisoned during the normal use of incense, and the poison is non-irritating poison. Suppose Miss A committed suicide. First of all, in the process of suicide, she will recall the reasons for her despair. In other words, with sadness, anger or pain, this expression should be left after death. Second, just as the cause of suicide is despair of life and society, the conventional phenomenon that despair will lead to is no love for real life. Similarly, a person who wants to commit suicide can't have the idea of traveling at first (the conditions learned below). Of course, the fact is understood as the saying that "I hope to release my feelings through travel, but I still feel depressed on the way and choose to commit suicide", but this statement will be broken with Miss A's behavior of accepting aromatherapy at the front desk. The function of aromatherapy is: comfort and beauty, relaxation and decompression, which shows that Miss A's purpose is to use aromatherapy to relieve stress and achieve the purpose of sleeping peacefully. Isn't it strange that if Miss A tries to commit suicide and uses aromatherapy before she dies, it may affect her decision to commit suicide? And if miss a wants to commit suicide outside, it is impossible to invite her companions.

To sum up, the expression state and the behavioral logic that does not conform to suicide can confirm that Miss A belongs to homicide.

How to kill: If the newly opened incense can't contain poison, but it dies of poisonous incense, the murder weapon should be an aromatherapy lamp-apply liquid poison or powder poison on the inside or outside of the lampshade of the aromatherapy lamp, and the temperature will rise with the turn-on time of the aromatherapy lamp. When it reaches a certain temperature, this liquid or powder poison should evaporate, thus mixing with the fragrance floating in the air, being inhaled by the deceased and eventually leading to death.

Heizi: There are three people except Miss A ... in turn: the autopsy officer, the waitress and her traveling companion. The autopsy officer who arrived at the scene after death had no time and motive to commit the crime; The waitress has the conditions to commit a crime. As for the motive, it can be attributed to his greed or being hired to kill people, but it is unlikely. But the real murderer is really his companion, for the following reasons: 1, traveling with the abused and emotionally unstable deceased, if they are of the same sex, then they should live in the same room in the hotel, and it is unreasonable that they are not on the scene to appease their emotions when they are companions. The real reason is that once the poison smeared on the edge of the aromatherapy lampshade is mixed with air, it will die together; In addition, if you don't act as the first discoverer of the case, the possibility of being suspected from a logical point of view will be reduced;

2, familiar with miss a's living habits, it should be said that the deceased had close contacts and won trust. Based on the above premise, Miss A's companion, as a temporary roommate, smeared poison on the cover edge of the aromatherapy lamp after confirming that Miss A would use aromatherapy, and left under an excuse before Miss A turned on the aromatherapy lamp.

As a real weapon, whether it is liquid or powder, I believe that when Miss A's companion smears it on the edge of the aromatherapy lampshade, traces will be found on clothes, fingers, travel bags and other places. Of course, the packaging of poison may also be found in these places. However, the worst-case scenario is that Miss B will leave the hotel with poison and leave together.

As for the motive, the speculation of beating eggs is probably a dog's blood love triangle.