Villain: Without Morality, You Will Not Be Kidnapped!

First, they discovered that there was an unsent text message saved in Yang Xiaowen's mobile phone. The content was: "I know you have been following me. If you don't stop, I will call the police." This text message provided a possible suspect. He is a person who has been following Yang Xiaowen.

Qi Lin decided to follow this clue further. He asked Xiao Li to try to trace the source of the text message and look for any communication records or other evidence related to it.

At the same time, Qi Lin also summoned Yang Xiaowen's friends and colleagues as well as Liu Haiyang, who had been mentioned, for face-to-face conversations. He asked them if they had noticed any suspicious people or behavior and hoped to uncover the truth of the case.

Through these face-to-face conversations, they learned some new information. One of the colleagues recalled seeing a vague man nearby on the night of the crime, but he disappeared after just a moment. This aroused Qi Lin's interest, and he decided to retrieve the surveillance video from the night of the incident to find more clues.

After watching a large number of surveillance videos, Qi Lin and Xiao Li finally noticed a suspicious figure. This person appeared on the street near Yang Xiaowen's apartment on the night of the crime, and kept looking in the direction of the apartment in one shot.

Qi Lin immediately saved the surveillance video and conducted further investigation on the suspicious person. They quickly obtained the man's identity and discovered that he was an ex-criminal with a history of stalking and harassing others.

Qi Lin decided to launch a secret investigation into the suspect. In order to ensure that the evidence was complete, he did not arrest him immediately. Instead, he asked Xiao Li to collect more evidence related to the suspect, and Xi worked with the forensic team to conduct further technical analysis of the crime scene.

In the following weeks, Qi Lin and his team finally collected enough evidence to point to the suspect through in-depth investigation and analysis. Finally, they successfully arrested the criminal who had been stalking and harassing Yang Xiaowen.

During the interrogation, the suspect finally admitted to stalking and harassing Yang Xiaowen. He said he had a morbid obsession with her for a while and felt he had a special connection with her. However, he insisted that he did not kill Yang Xiaowen, but just followed her silently.

Finally, by gathering all the evidence, Lin and his team succeeded in revealing the truth. The suspect was formally charged.

Sorry, there seems to be some errors in my previous answer. The fact that the suspect followed and harassed Yang Xiaowen is real, but he was not directly involved in Yang Xiaowen's murder.

During further investigation, Qi Lin and his team discovered other important evidence. First, they found a knife near Yang Xiaowen's apartment with obvious blood stains on it. After testing, it was confirmed that the blood on the knife matched Yang Xiaowen's DNA.

Secondly, through interviews with neighbors, they learned that they heard a quarrel on the night of the crime. A neighbor said, “She once saw a vague man leaving Yang Xiaoshi’s family.

Based on this evidence, Qi Lin and his team re-examined all the clues and finally deduced a new suspect, Yang Xiaowen's ex-boyfriend Zhang Kai.

They contacted Zhang Kai and conducted a detailed interrogation. During the inquiry, Zhang Kai began to confess the reasons for his breakup with Yang Xiaowen and his emotional entanglements. He admitted that he went to Yang Xiaowen's apartment on the night of the crime, but he denied the accusation of killing her.

Qi Lin and his team launched a more in-depth investigation into Zhang Kai. They searched Zhang Kai's residence and found a knife with blood stains similar to the one on the knife. After further forensic analysis, it was confirmed that the knife was consistent with the wound when Yang Xiaowen was found.

In addition, they also found some communication records and electronic information related to the case, hinting at conflicts and quarrels between Zhang Kai and Yang Xiaowen.

Finally, faced with this evidence, Zhang Kai admitted that he had killed Yang Xiaowen. He explained that due to the emotional entanglement and anger after the two broke up, they lost control of their emotions and led to the tragedy.

Qi Lin and his team arrested this important suspect and reported the progress of the case to the relevant departments. In the subsequent trial, Zhang Kai was found guilty of murder and sentenced to corresponding punishment.

The case was finally resolved fairly, and Yang Xiaowen's family and friends also received answers and the comfort of closure. Qi Lin and his team showed professionalism and persistence in this investigation, spoke for justice, and returned the truth to the victims.

Detective Qi Lin walked into his office and sorted out the documents on the commercial espionage case that had just been cracked. This is a complex case involving multiple companies and various secret transactions. He knew that now was the time to summarize and connect all the clues.

Suddenly, the phone ringing broke the silence. Qi Lin answered the phone and an anxious voice came: "Mr. Qi, this is Mr. Wang, our company's confidential documents have been stolen! Please help investigate." Qi Lin heard the nervousness in Mr. Wang's voice. He knew this might be related to the industrial espionage case he had just cracked.

Qi Lin agreed on a time and place to meet with Mr. Wang. In the conference room, Qi Lin asked Mr. Wang in detail about the details of the theft. Mr. Wang told him that the company's sales data, R&D plans, cooperation agreements and other important documents in the recent months of 2013 were missing, which was a huge blow to the company.

Qi Lin began to analyze the case. He felt that the theft was somehow related to previous industrial espionage cases. He decided that first, he needed to find suspects who had been involved in previous cases to see if they were related to this incident.

He investigated several people and found that they all had records of being in the vicinity of the company during the time of the theft. Qi Lin decided to take them one by one to the police station for interrogation.

The first person brought to the police station was Li Wei, who was once a senior engineer of a competing company. Qi Lin asked sternly: "Mr. Li, do you have anything to do with this theft?" Li Wei's eyes flickered and he began to retort: ​​"I have been away from that company for several years, and I know nothing about it. "

Qi Lin didn't believe his excuse. He continued to ask: "Have you ever had access to the company's confidential documents? Do you know this information very well?" Li Wei was silent for a moment, and then admitted: "Yes, I have had access to these. documents, but I never leaked any information.

Next, Qi Lin met with another suspect, Liu Fang, who was the marketing manager of a competing company.