To get to Kings Cross, you still have to take the subway. The wind was bitter, and most of the people walked briskly.

He happened to see the young man wearing a dirty knitted round hat before, and he was selling it at the subway entrance. However, most of the people avoided him.

“big issue！”

Zheng Yuanli rummaged through his pocket and found a pound, and wanted to hand it to him, he wanted to buy a copy like a teacher. Although he may not have needed this kind of street magazine too much, he thought of the teacher when he saw the young man, as if if he had helped him, the teacher's feet would grow again.

As he handed the pound to the young man, the young man looked up at him. It seems that he recognized him as someone he had met not long ago.

Zheng Yuanli was about to hand the money to the young man, who was busy waving his hand.

“nonono！”

Kindness? It's very strange, why would this young man not let Zheng Yuanli buy his magazine? The young man stuffed a magazine into Zheng Yuanli's hand.

He glanced at the cover.

"An Oriental hero saves the little citizens of London."

The photo is very blurry, it should be taken by mobile phone, but it is a photo of Mr. Guo who was injured at the scene of the explosion at that time. The photos have been processed to try not to appear bloody.

Zheng Yuanli saw the cover, opened it and looked at the contents. The testimonies of several eyewitnesses are described in detail.

"Oh my God, that's the bravest man I've ever met."

"In the face of demonic acts, the brilliance of humanity knows no race."

"May God bless that hero."

The London police are investigating the case and will definitely bring the culprits to justice. No group has claimed responsibility for the case.

At the moment, no group has claimed responsibility for the case. That is, if it is a serial bombing, then their purpose has not been achieved, and there will be further actions. Where is the further action?

Zheng Yuanli raised his eyes and looked at the ragged young man in front of him, he seemed to want to say something, and said to Zheng Yuanli for a long time.

"He'll be fine."

"Well, he's fine."

After listening to Zheng Yuanli's words, the young man grinned again and opened his scumbag mouth to reveal his not very neat teeth, and laughed. Zheng Yuanli thought, this young man is really simple, laugh when he is happy, and cry when he is unhappy. took such a comforting sentence seriously, which made Zheng Yuanli himself feel that his worries were too heavy.

However, this feeling was soon interrupted by another voice in his heart.

The ease is theirs, and the responsibility is theirs.

I have the obligation to repay the kindness of my teacher, just like I have to repay my father's kindness before I have time to repay it.

Although the responsibilities and obligations are heavy, if there is no such weight, it seems that it is a lightness that can no longer be borne in life.

Zheng Yuanli clamped the magazine tightly and flipped it through his pocket. He found the Chinese knot that had been broken on the train.

Zheng Yuanli said as he shoved the Chinese knot into the young man's hand.

"A small gift that can bring you good luck."

"Thank you."

It's not far from New Oxford Street to Kings Cross by tube, although the bombing just happened not long ago. But now everything is back to normal with Kings Cross.

There are still people coming and going on the overpass, except for the occasional person who passes by the blown up Nokia advertising light box and stops for a moment. Draw a cross on your chest and pray for the victims to ascend to heaven sooner.

The bombed-out advertising box was already blown up, the beautiful girl's face and hands were scorched, and only the photo of Nokia 8800 was still standing. Just like the quality of the phone itself.

From the traces at the scene, there is no doubt that the bomb from the Kings Cross bombing was hidden in a light box.

First of all, the light box has not been replaced, in the process of exploding. The force of the impact first broke through the light box, causing the glass shards to scatter and explode, followed by the shrapnel of the bomb itself rushing out of the glass box.

The process is very fast.

At the same time, the deadly air pressure and wind and waves shattered the other advertising boxes, albeit as well. However, only the metal frame of the advertising box where the bomb was hidden was distorted and deformed by the simultaneous action of high temperature and impact, and scattered in all directions.

Although the advertising box and the fireproof shaft were also affected by the explosion, the metal parts were not deformed because the temperature was not enough.

From this, it is not difficult to distinguish which advertising box the prisoner hid the bomb in. But knowing so much makes no sense at all, and any police officer and trace scholar at the scene has the ability to easily understand the source of the bomb. Next, the aim was to further confirm the identity of the prisoner.

First of all, it is assumed, and only assumed, that there is a connection between the two bombings. After all, law and order in London had been fairly good until then, and there had been no bombings in the last year or so. If two cases occur in a row, the offender can only be the same person or the same group.

Unlike in the case of London Bridge, Kings Cross is an important dense transport hub with surveillance cameras. Because, the security of London's train stations was also not good. The train station is not safe and secure, and it is a world problem.

Then, if the prisoner is a person, it is necessary to find a way to temporarily solve the surveillance camera. It cannot be destroyed, and if it does, it is quite possible to attract the attention of the guards in advance.

Zheng Yuanli can think of two methods.

The first option: team crime, which is like close-up magic on stage. There are many ways to attract attention, such as jamming the camera's perspective, but this stuck perspective can't just be stuck once, and different people have to be stuck several times in 48 hours, so that the police won't know who planted the bomb when they detect. Even if the police are looking at the surveillance footage now, it is not always possible to tell who actually put the bomb in the advertising box and when.

The second option: individual crime, this plan, is much simpler, the prisoner only needs to put the bomb in the advertising box 48 hours in advance. Because the current video is only kept for 48 hours, it will be covered up if there are more. But there is a problem with this method, and that is that there is a possibility that the bomb will be detected in advance. Crimes of this magnitude, and the consideration that the perpetrators should have been carried out with some kind of political/political appeal. The prisoner, then, is unlikely to expose himself to this level of risk.

To sum up, it is preliminarily inferred that the crime was committed by an organized team.

The size of the perpetrators is 4-5 people.

There was once a theory that serial killers would come back to the scene to watch the situation, and some would even attend the victim's funeral to seek happiness. This theory is conclusive, incorrect, and not all serial killers will necessarily do it. Only a small percentage will return to the site, and the motivations and reasons for returning to the site vary.

The reality is that 30 to 35 percent of serial killers do this kind of thing. It's not a high percentage, but it's not low.

When a team of 4-5 people commits a crime, someone will inevitably be on the scene. The reason is simple, the psychological stimulation of a case of this magnitude is extremely serious for everyone in the team. Everyone's psychological quality is different, and there will definitely be people who can't help but want to go back to the scene to see the situation.