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

Chapter 124 The Robber's Weakness
In the dead of night, Zhu Tao, a policeman, led a team of workers to patrol, vigilantly inspecting the most crime-prone areas in the jurisdiction.Suddenly, a black shadow rushed across the corner.Zhu Tao rushed forward immediately, just as he saw the black shadow flashing into a Shikumen house.

Just as Zhu Tao turned around in doubt, a female worker ran up panting. Seeing Zhu Tao in police uniform, the female worker cried and reported that a young man had just robbed her of her wallet, watch, and gold necklace.

Zhu Tao asked about the characteristics of the robber, and the female worker replied that the robber had long hair and a long beard, and carried a black leather bag casually, and could not explain the rest.Zhu Tao immediately took the female worker to knock on the door and entered the Shikumen house. He visited three households successively. Although there were young men in all of them, they did not have the characteristics of robbers.

When entering the fourth household, a young man living alone was watching the Hong Kong video "A Thousand Kings and Heroes". This young man has a clean hair and no beard.When Zhu Tao was about to ask questions in doubt, the female worker found a black bag in the corner of the room and identified it as the leather bag carried by the robber.The young man replied that it was forgotten by a friend after dinner here.As he said that, the young man opened his leather bag, took out several cans of beer, and opened the cans for Zhu Tao to drink. When pulling the cans, he might have used too much force, and the foam from the cans splashed the young man's face.

Zhu Tao then asked the young man what time he got up at home, how long he had watched the video, and what was in the front of the video, etc. The young man answered fluently, seemingly flawless.When Zhu Tao was about to leave helplessly, he suddenly realized that the young man was the robber.What flaw did the robber reveal?
[Answer] Beer will spray out to prove that the purse was shaken violently before, but the suspect said that a friend left it during dinner time. It was already late at night when Zhu Tao came to question, so what the suspect said was false, then The purse was not left by his friend.

(End of this chapter)