Hayden sat on a police chair, his right leg kept swaying. His right hand was tightly holding a football, and there was still undried soil on the football.

Hayden was called back by his mother during training. After leaving the training ground, they drove to the police station, and then his mother went to take the transcript.

The police station was busy, and Hayden looked around and saw busy figures.

Hayden was a little bored and nervous. He didn't know why he came to the police station, but it was obviously not a trivial matter to look at his mother's emotions.

This reminded Hayden of the last time he came to the police station, which was ten years ago. His father encountered a robber at home. After a fight, he was stabbed to death by a kitchen knife. The family had to take a police car to the police station in the cold winter.

Hayden suddenly remembered that when he seemed to be playing football, he was called out.

He didn't remember whether he was holding football at that time, but the connection between football and the police station still made Hayden hate it.

Hayden suddenly threw the football out as if his hands were burned.

"Hey, don't play football in the office." The busy policeman behind the desk raised his head and shouted. He was too busy and had no time to educate the teenagers. He stretched out his feet and pulled the football under his desk and continued to work.

Hayden didn't want the football anymore. He stood up and looked at both sides in a daze. He wanted to leave but was a little afraid, so he stood on the balcony and had a breath of air.

Several policemen were already smoking on the balcony. They saw that Hayden was not from a family and each smoked their own cigarettes and lit them silently.

This is the culture of Swedes. Smokers will smoke together, but they don’t have to chat. Moreover, they always smoke their own cigarettes, rarely hand over cigarettes, and they don’t even lend lighters, and they won’t help others light cigarettes.

Hayden stood in the cold wind with his arms folded to cool his emotions.

I don’t know how long it took, but the door on the balcony opened and switched, and suddenly a sound came from: “Haden…Haden!”

"Mom?" Hai walked out of the balcony and happened to see his anxious mother.

"Haden, come here." There were signs of makeup being diluted on my mother's cheeks, which seemed to have cried.

Hayden was startled, ran over and asked, "Is something wrong?"

"The murderer who killed your father has been found." The mother kept her son's shoulder and started crying.

The police around heard the sound and just looked back, not saying anything more. In the past two days, they have seen too many similar situations.

But Hayden froze all over. His lips were so dry that he asked tightly, "Who is it?"

"I'll let the police officer tell you." The mother shook her head and walked forward with her son in her arms.

Hayden is 17 years old and his mother, who has broad shoulders, can't hold her at all, but his steps are stumbled and he almost falls.

"Officer Fox, this is my son." The mother sat down with her son and said, "Please tell him about his father's situation."

"Of course." Fox looked down at the file and said, "Hayden, can I call you Hayden?"

"Yes." Hayden looked at the majestic police officer, without any energy.

Fox nodded and said, "Hayden, our Stockholm Police Department currently has a new technology called PCR. I wonder if you have heard of it?"

Hayden shook his head.

My mother said, "He spends most of his time playing football."

Fox nodded and said, "PCR is a means to identify DNA. DNA is a genetic factor that everyone has. Simply put, if we can get a cell, we can determine whether the cell belongs to you. Moreover, the current technology can check cells that have been around for a long time..."

Hayden was a smart child. He immediately woke up and shouted, "My father's ring, his ring, mom... Dad had hit the murderer at the beginning, and there was blood on his ring."

"I know, I know." The mother quickly comforted her son and said, "I had handed the ring to the police a few days ago. When I was watching TV news before, I thought of the Marlès case."

When the robbery happened that year, his father resisted as much as possible. He hit the other party with his right hand with the ring, and it was likely that he broke the other party's face. Perhaps it was because of the haste, or perhaps because the murderer looked down on the value of the graduation ring and did not take it away.

The mother then put away the ring and did not clean it, which gave the police the opportunity to collect DNA evidence on it.

The mother explained, but there was no relaxed expression on her face.

Hayden didn't pay much attention, then turned to the police and said, "Did you find the murderer? Through the ring? Whose DNA did you compare?"

"Hayden, listen to the police officer first." The mother stopped him and handed him a glass of water.

The police officer waited for Hayden to calm down and said, "Hayden, according to your mother's request, I would like to explain our case handling process in detail."

"Okay... OK." Hayden was shocked by the officer's solemnity.

The police officer coughed, looked down at the file and said, "Hayden, I want to tell you some questions about PCR technology first. First, PCR cannot directly find the murderer. He can only compare whether the two DNAs are consistent or related. Just like fingerprints, we can compare the fingerprints left on the scene with the suspect's fingerprints. If they are consistent, we know that we have caught the person. If they are not consistent, we know that we have caught the wrong person, but we don't know who is right."

"Didn't you catch the murderer?" Hayden didn't understand.

"Please listen to my details." The police officer looked up at Hayden's eyes and said, "Hayden, there is not much DNA information we can use for comparison at present, so in the first comparison, we did not find a clear suspect."

Hayden's face was full of suspicion.

"But we did find something." The officer coughed and said, "Do you remember what I just said? PCR can be used to compare whether two DNAs are consistent or related?"

"kindness."

"After we compared the blood on the ring, we did find a situation... Well, we found that the DNA on the ring has some similarities with the DNA on the bloody clothes left by your father."

The police officer said that the mother looked at her son tightly.

"What does that mean?" Hayden instinctively felt that this was not good news.

The police officer sighed and said, "The DNA on the ring belongs to your father's half-brother."

"Uncle Nelson?" Hayden exclaimed. His father had only one brother, and even one half-brother. He was taken by his grandfather's wife after his divorce. The two families also had contact with each other and walked very hard.

"It's not confirmed yet, our colleagues are investigating. Someone has already invited Mr. Nelson to the police station." The officer replied in a low voice.

For him, such a case was not surprising. The two brothers were so dirty that one died and the other pretended to be a robbery. In an era of better public security, it seemed easier to understand.

The only thing that is difficult to understand is that PCR can actually determine the brotherly relationship between the murderer and the deceased. It took the police officer a while to accept this fact. As for the principle, he was not very clear.

Haiden and his son hugged each other and cried bitterly. Once the emotions hidden in their chests were vented, they were like lake water blocked by a dam and could not stop.

The police stood up gently, without saying a word, just leaving the two people in the room.

He has more work to do today.
Chapter completed!