Crime scene: 162 mystery solving puzzles to find out who the murderer is

Chapter 90 The Death of the Spitz Dog
This is what happened after the metropolis realized coal gasification.The gas contains carbon monoxide, which can kill people if inhaled.

One day, a single woman was poisoned to death by gas poisoning after taking sleeping pills in a Japanese-style room with six mats in a certain apartment and falling asleep.

And, his pet dog Spitz also died.Somehow the dog had a rope around its neck, and a piece of thin sausage remained beside it.

It is estimated that the time of death was around 10:30 midnight, and both the partition and the windows of the Japanese-style room were tightly closed.If the gas switch is turned on for less than 0 minutes, it will fill the entire room, enough to kill a person.That is to say, the criminal turned on the gas switch at about [-] o'clock in the middle of the night and escaped.

However, when the culprit was apprehended, he claimed to have been away from the scene of the crime from 8pm until the next morning.That's a pretty solid alibi.So, what method was used to delay the gas injection time by two hours?

[Answer] The criminal stuffed thin sausages into the mouth of the gas rubber pipe, and not only gave sleeping pills to the victim, but also gave sleeping pills to the Spitz dogs. After letting them fall asleep, they turned on the gas switch and left the scene at around 8:[-] p.m. .

In this way, although the gas switch was turned on, the mouth of the rubber tube was blocked and the gas could not flow. However, at about 10 o'clock in the middle of the night, the dog woke up and found the sausage. He wanted to eat it, bit it and pulled it out. , a large amount of gas leaked out, and the victim was poisoned and died about 30 minutes later.

Of course, the spitz dog will die too.If the criminal does not tie up the dog with a rope, the dog will be startled by the gas, and then knock open the door and run out of the room. If the partition is opened, the gas will spread, and the victim will not be poisoned to death in a short time.

(End of this chapter)