Chapter 4: Solving.

At the crime scene, Captain Stan and Leonard just arrived and saw Albert already there. Seeing the two of them coming, he frowned and said: "If you guys let go so early, it's good that we'll have to catch the killer, but that's the job of the police, I don't care." His face showed an angry expression. Leonard smiled wryly and said: “Calm down, it's our fault, can you tell me who the killer is and how he committed the crime?” Seeing that Captain Stan still didn't say anything, Albert shrugged and pointed towards the door of the victim's room: “Now, I’m going to demonstrate how the killer got out of the locked room?” Then he pointed in the direction of the victim's body: "Did you notice a strange blood stain there?" The two men went to the victim's body, the scene was still intact. They only saw dried blood stains everywhere, Leonard asked: "Where is it, why can't I see it?" He pointed to the key chain: "Hey guys look at the bottom right next to the key is there a stretch?

Captain Stan turned to look and it was true that there was a small trail of blood that would not be detected if you weren't paying attention carefully: "But what does this have to do with how the killer escaped?

Albert smiled: "The killer tied a piece of thread to the key then he tied the end like this." Then he took out a small piece of thread, he passed it through the small hole of the key chain, then he looped the thread around the foot of the table next to it and stretched it to the door. He went out and locked the door. He pulled the string. the key gently slipped through the door gap, went to the edge of the table and then passed through the table leg which was located at the original position to the surprise of captains Stan and Leonard. "That's how the killer got out of the closed room." Stan was extremely surprised with his deduction, he quickly asked: "How do you know who the killer is. We did not find any clues.” He put a finger to his mouth, making a mysterious gesture: “First of all, I can confirm that the killer is a man of short height. Look at the knife, the knife mark on the victim's body, is it slightly up? That shows the modest height of the killer. Next, as I said, the perpetrator knew the victim. At the crime scene, the clues show that the killer is a very careful person and especially he has great hatred for the victim. Do you remember the bloodstain on the 5th floor emergency exit? I checked, it's a small Versace Venus women's watch. Try the lumion reaction on the dial and you'll see.” After listening, Captain Stan and Leonard looked at each other and said urgently: "So what are you waiting for? Leonard, you immediately report to the task force, we must quickly catch the culprit to the law."

Midnight in city A, a convoy of police cars was speeding in the direction of an apartment building. They then stopped at a place not far from the suspect's apartment. Captain Stan, holding a walkie-talkie, said: "Team 1 and Team 2 split up to surround the building, the rest follow me." Immediately after that, the police team quickly divided into 3 action teams. Two nests hide in neighboring areas. The other group is directed by Captain Stan to go up to the 8th floor of the building.

Inside the apartment, Jade and 3 others are sitting on a glass dining table. They ate and chatted happily with each other. Suddenly she heard a knock on the door from outside. She went to the door and said from inside: “Who is it?” The man's voice outside: “I am the management of the building; there is something I need to discuss with you.”

She looked into the viewfinder of the door. It was a person wearing the uniform of the building. She opened the door and said: "what’s wrong? It’s too late to bother me.” As soon as the door opened, a group of people in police uniforms entered, two of them grabbed her arm and restrained, and handcuffed her. A police officer spoke loudly: “Jade, you have been arrested on suspicion of attempted murder. You have the right to remain silent. Her every word can be used as evidence in court. After saying that, he turned around and shouted to the police officer next to him: "Search!" they led her down to a police car parked not far away and then pressed the gas to drive away despite the girl screaming that she was innocent.