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

Chapter 112 The Mystery of Natural Gas Poisoning

One night in early autumn, a man who lived alone was gassed to death in his house.In the middle of the night, the caretaker opened the door of his room because he smelled gas, and the body was found.A long plastic pipe was attached to the piped natural gas switch in the kitchen, and a large amount of gas was leaking out of the pipe.For unknown reasons, there was a large water stain on the kitchen floor.

After the autopsy, it was found that the cause of death was carbon monoxide poisoning, and it was also found that the deceased had taken a small amount of sleeping pills.The time of death was about 9 o'clock in the evening.

If a person in this small room closes the doors and windows and turns on all the natural gas, he will definitely die within 20 minutes.In other words, the murderer may have opened the gas pipe around 8:40 and fled.However, the police arrested the suspect two days later, only to find that the suspect was locked up by the police in a detention center for a whole night because of a car accident at 7:7 p.m. that night.If the suspect had turned on the gas pipeline before 7 o'clock and then fled, the time of death of the victim should have been 20:9 p.m.However, the victim did die around [-] o'clock in the evening.

So, what method did the suspect use to delay the release of the natural gas for 1 hour and 40 minutes?

Tip: Don't think there's anything wrong with the natural gas pipeline project, the suspect is just a little tricky.

[Answer] The water on the ground is the best clue. The prisoner dragged the victim who fell asleep after taking sleeping pills to the kitchen, connected a frozen plastic pipe to the natural gas outlet of the pipeline, then turned on the switch, closed the doors and windows and left. After a certain time, the ice turned into water and the natural gas leaked out, delaying the death of the victim.

(End of this chapter)