Lao Chen did not call Xu Tian's phone, so he had to call Dr. Lin, and after learning that Xu Tian was asleep, Lao Chen had to give up asking Xu Tian for help.

Looking closely at this crime scene, Lao Chen simply had no clue, relying on Xu Tian to reason about the case for a long time, Lao Chen felt that his reasoning ability had decreased a lot.

"Team leader, what are you doing?" Li Ming said on the side.

"When did I go in a daze? Be all abroad! Lao Chen reprimanded Li Ming and said.

"Xu Tian can't come? So how do we solve the case? Li Ming scratched his head and looked very distressed.

Li Ming's move made Lao Chen feel very slapped in the face, at this time, Lao Chen thought about all the cases that happened during this time, almost all of them relied on Xu Tian and Li Zhitong to solve them, at this moment, Lao Chen felt that his career had been very insulted.

"What stupid things are you talking about? Without Xu Tian, we wouldn't have been able to solve the case? Lao Chen glared at Li Ming and said.

"Yes, yes, yes! We still have Li Zhitong, please hurry up and call Li Zhitong over! As long as she comes, we will be able to close the case before dawn. Li Ming said with a smile.

Lao Chen was simply impressed by this eyeless Li Ming, and at this time, Lao Chen had the idea of regretting giving Li Ming's internship report an excellent evaluation.

"You kid go out and buy me a bottle of ice drink, I need a pick-me-up." Lao Chen Sai gave Li Ming a five-yuan voucher and said.

"Where am I going to buy it for you at such a late hour?" Li Ming said with some complaint.

"Hurry up and buy it!" Lao Chen scolded Li Ming and said. "If you run out of two miles, you have to buy it back, and if you don't have ice, you can get it back if it's frozen into ice outside."

After sending away Li Ming, Lao Chen put on white gloves and prepared to search the scene of the crime, and at this time, the forensic doctor also completed the preliminary autopsy.

"How? Is there any significant discrepancy between the autopsy results and my judgment? Lao Chen asked.

"Probably not, except that the security guard who died on the living room table was a little strange, not from being frightened, as you would judge, because I'm sure the security guard didn't have a heart disease." The medical examiner said.

"And what was the cause of his death?" Lao Chen asked.

"It's an electric shock!"

"Electric shock? But there were no wires or anything like that at the scene of the crime! That table was also a round table made of wood, an insulator, how could he have died of an electric shock? Lao Chen was very puzzled by this.

"I don't know very much about this, but I can be sure that the security guard did die from an electric shock, and it was a very strong electric current, like high-voltage electricity used in industry."

After listening to the forensic doctor's explanation, Lao Chen felt very confused, because Aunt Wang did not have any high-voltage electricity at home, and even if someone used high-voltage electricity at the scene of the crime, it would definitely affect the power supply of the entire unit building.

Lao Chen had to re-examine the scene of the crime, there were no other items at the table where the security guard was electrocuted except for the fallen dishes and chopsticks, and the floor of Aunt Wang's house was also a very old wooden floor, which looked like the style of twenty years ago, and the floor was already a little protruding, and there was still some moldy smell between the cracks in the floor.

At that time, the security guard's feet were hunched on the table, and Lao Chen remembered that the security guard's left foot touched the sofa, but the sofa was also an insulator and could not conduct electricity.

Thinking of this, Lao Chen suddenly thought of the incident that happened when he came to Aunt Wang's house at eight o'clock in the evening, when Aunt Wang had been standing at the table, Lao Chen finally found some cats, and took out a posthumous photo from under the sofa while Aunt Wang was pouring tea.

It was precisely because of this posthumous photo that Lao Chen found out that Aunt Wang had some mental illness.

But Lao Chen felt very strange, and it was a little too easy to pull out the posthumous photo under the sofa at that time.

Because judging from Aunt Wang's actions at the time, she should be trying her best to hide this posthumous photo, in order to hide the living wife she said.

This matter is very reasonable, even if Aunt Wang is not mentally ill, it can be explained by missing her wife excessively.

But the problem is that Lao Chen pulled out the posthumous photo from under the sofa, Lao Chen felt that since Aunt Wang had been guarding this posthumous photo from beginning to end, why did Aunt Wang simply fall for her own plan to divert the tiger from the mountain at the last moment?

The scene at that time was that Lao Chen wanted to drink a glass of warm water before leaving, and Aunt Wang went to pour water for Lao Chen very happily, and it was during this gap when Aunt Wang poured water that Lao Chen quickly leaned down and pulled out the posthumous photo under the sofa.

The more Lao Chen thought about this matter, the more he felt that something was wrong, an old man who missed his wife very much, and also had a slight mental illness. Lao Chen, who has rich experience in handling cases, understands the world of mental patients very well, most of them are very persistent in one thing, if Aunt Wang keeps the posthumous photo from the beginning, then she can let Lao Chen pour the water by herself when Lao Chen begs for water to drink, and even Aunt Wang can stand in place without moving her feet, and she can touch the kettle as soon as she stretches out her hand.

But Aunt Wang didn't do this, but moved her steps and turned her back to the sofa where the posthumous photo was hidden to pour water for Lao Chen, as if she deliberately wanted Lao Chen to pull out the posthumous photo.

So what is Aunt Wang's purpose? Lao Chen couldn't help but think.

By the way, it is the act of leaning down and pulling out the posthumous photo, when Lao Chen pulls out the posthumous photo, Lao Chen will inevitably be a little surprised on the spot when he sees that it is a posthumous photo, but when people are surprised, there will be a slight stagnation action, even if it is only two or three seconds, it is enough for Aunt Wang, not to mention that these consecutive actions when Lao Chen stepped forward and leaned down also took two or three seconds.

Lao Chen thought that Aunt Wang must be trying to find a way to hide something at that time, and the posthumous photos might just be a sound.

So Lao Chen still doesn't quite understand, why did Aunt Wang do these things? With only five or six seconds, what could she do?

"Team leader! I've bought the iced drink......" Li Ming shouted and walked in from outside.

At this time, the other police officers at the scene of the crime were all silently watching Lao Chen thinking about the case, but Li Ming's words completely interrupted Lao Chen's train of thought.

Lao Chen was so angry that he almost raised his hand, but when he saw Li Ming giggling and holding a bottle of ice drink, Lao Chen felt that he couldn't cry or laugh.

"Bought it back so quickly?" Lao Chen said.

"Yes! There was a small shop downstairs, and we just woke them up when we went out to the police, so I knocked on the door to buy it. Li Ming said.

"Knock on the door?" Lao Chen's eyes widened, and the question in his heart was suddenly opened by Li Ming's casual words.