According to Tang Yongsheng's account, Luo Tong did not instigate him to kill people, but Luo Tong was violently threatened by Tang Yongsheng, and only revealed Jiang Ran's private information to him as a last resort.

On the surface, Luo Tong is almost an innocent "victim". If he made any mistakes, at most he didn't report them, which is really nothing compared to instigating murder.

But think about it carefully, was Luo Tong really unintentional when he told Tang Yongsheng about Xiaojing's death? He has known Tang Yongsheng for many years, knows the other party's temper very well, and can also predict the other party's reaction after learning this information, but this is not enough to prove that Luo Tong deliberately induced Tang Yongsheng to kill.

Gu Song didn't have to think about it to guess that Luo Tong's answer to the murder that happened in R City five years ago must be "I don't know", and the police will undoubtedly blame Jiang Ran for the case that year.

Maybe that's the truth, it's the best outcome, and it's the one that everyone wants to see. Three horrific homicides, spanning five years, and no matter how many police forces were involved, they dreamed of bringing the murderers to justice.

Gu Song didn't want to end all this and give Xinlei an explanation as soon as possible. But what if, what if the truth isn't?

In 2011, when the "6.18 murder case" occurred, Luo Tong had recovered from illness and was discharged from the hospital. For some unknown reason, he changed his mobile phone number and home address and disappeared from the sight of friends and family. No one knew exactly where he lived and what he was doing during that time. There is only one person who is still by his side and continues to do psychological treatment for him, and that person is Jiang Ran.

From the analysis of the psychological state at that time, Jiang Ran did not have sufficient reasons to kill. This can be reflected in two things:

First, Luo Tong was still receiving psychological treatment at that time. He avoided the care of his family and friends, but he only trusted and relied on Jiang Ran. This feeling of being needed by a loved one will make Jiang Ran feel happier and more satisfied than ever. Under normal circumstances, when people's psychological desires are satisfied, they will not do perverted things such as killing people to vent their anger or seeking excitement.

Second, according to the reactions of Jiang Ran's cousin and her former colleagues, Jiang Ran's performance during that period was relatively normal, and there was no tendency to psychopathology and depression at all.

To sum up, Gu Song thinks that it is very unlikely that Jiang Ran is the murderer in that case. In contrast, Luo Tong, who suffered heavy physical and mental damage, escaped from reality, and hated God for treating him unfairly, and his motive for committing the crime was more sufficient. In addition, Gu Song always believed that the murderer had doubts about his methods of subduing the victim.

However, the reality before us is grim. First of all, it is difficult for him to find evidence of a crime committed five years ago. Second, the task force definitely wants to conclude this series of cases as soon as possible. With the results so clear, no one would believe his speculation (or subjectively unwilling to believe it) and continue to waste time and manpower on this series of cases.

Finally, and most importantly, Jiang Ran, the number one suspect in that case, had been killed by Tang Yongsheng. Whatever the original truth, there is no proof now.

If Jiang Ran is not the murderer, then what Luo Tong did has another motive: to kill people and kill people. It's just a pity that this is still a speculation, and there is not enough evidence to prove it.

A few days ago, when he went to the D City Psychiatric Rehabilitation Hospital with Qiao Sheng to investigate, Gu Song inquired about a situation from the staff, saying that at noon on July 10, they received a call from a man. The other party claimed to be Jiang Ran's friend, and wanted to ask Jiang Ran if he had been discharged from the hospital and knew Jiang Ran's whereabouts.

Afterwards, Gu Song asked Qi Ruonan to find out the fixed phone number, and it turned out that it was the phone number of Luo Tong's clinic, and the caller was Luo Tong nine times out of ten, so things became interesting.

The relationship between Luo Tong and Jiang Ran is very complicated. Before the murder case in Jinshui County, Luo Tong had not contacted Jiang Ran for more than four years, but at noon on July 10, that is, the police asked him to go to the county bureau to talk, and after he learned the inside story of the "7.7 murder case", he immediately asked Jiang Ran about Jiang Ran at the Psychiatric Rehabilitation Hospital in D City, which was afraid that there were some unsavory secrets.

Gu Song had a bold idea in his heart, although he knew that his idea might not be approved by others, but after ending the interrogation of Tang Yongsheng, he still told Qiao Sheng the following inferences.

At around 12 a.m. on June 18, 2011, Luo Tong strangled the victim Xiaowen with a rope in a public toilet near a shantytown in the northern suburbs of R City.

After committing the crime, Luo Tong's heart was tormented. It happened that during that time, he was receiving psychological counseling from Jiang Ran. He is far away from his family and friends, and there is only Jiang Ran by his side, who can be trusted and relied on. In order to ask for help, he truthfully told Jiang Ran what happened that night and the pain in his heart.

It is conceivable how this terrible incident had a huge impact on Jiang Ran's life.

Jiang Ran loves Luo Tong deeply, loves crazy, persistent, and thoroughly, and is even willing to carry everything for the other party. Even if Luo Tong killed someone in such a cruel way, she would never have told the police about it.

As Luo Tong's psychological counselor and lover (she must have thought so herself), she did her best to save Luo Tong from the abyss of crime, stifle Luo Tong's desire to kill, and let him see again, which is probably the reason why the perverted murder case only appeared once that year.

With Jiang Ran's help, Luo Tong "lived", but he did not repay Jiang Ran's affection, but ruthlessly got rid of Jiang Ran and returned to Jinshui County to live alone.

Luo Tong's "betrayal" made Jiang Ran feel cold and desperate to the bone.

She has worked so hard for Luo Tong, and she does not hesitate to bear the guilt of killing, and endures the torment in her heart every day. Scenes of the killings came back to her mind over and over again, until they tortured her and broke down, and she ended up in a mental hospital.

Soon after being hospitalized, Jiang Ran began to hallucinate abdominal pain, which was completely influenced by the case. She knew every detail of Luo Tong's crime, and had reacted that terrifying scene countless times in her mind.

She also studied medicine, minored in psychology, and has the corresponding ability to commit crimes. When she went out of the hospital, she found that someone had taken her place by Luo Tong's side, and the tragedy happened......