Maybe it's because of his keen feeling, Dufo, Save, and Katerina all think that this young man who delivers food is definitely not a killer.

He lacks a kind of energy and a special thing, which may be crazy or calm, but he just doesn't.

Dogs will not eat mud that looks like shit, but they will not let shit that looks like shit. They always have a way to distinguish them.

"Who asked you to deliver food?" Although Katerina knew that this young man was probably just a delivery person, she still had to finish the work she should do.

She squatted in front of the young man, pressed the gun against his temple, "Think clearly before answering!"

The young man's body was trembling slightly. He squeezed his eyes and looked like he was thinking. He opened it three to five seconds later, and spoke out his phone number when he was in the restaurant and the boss who asked him to deliver the takeaway.

Two agents who carefully opened the takeaway lunch box outside the house shook their heads at Katerina. The box was indeed food, not an explosive. After some simple test strips, there was no toxic ingredients in the food.

While calling the investigation team to control the people in the restaurant and pursue the people who placed the order, the other side did not let the young man go, but locked him in the kitchen.

Although I don't understand why the killer sent a takeaway delivery person to alarm them, all this must have a clear purpose, and it is very likely that the killer who came to assassinate Dulin was a veteran.

Once again, all the agents were guarding their jobs, Katerina returned to the door of the utility room and knocked on the iron door, making a dull sound, "Are you still inside?"

"No, I'm not here!", the out-of-tune voice was filled with strong confidence and optimism. The dark enclosed space seemed to not allow Du Lin to feel any fear and depression atmosphere. He even had the interest to joke at this time!

Katerina has seen many people who are very powerful on the surface in the MIIS, including spies trained from other countries, celebrities and politicians.

These people don’t need to use too many means, just locking them in a closed space, which is enough to make them feel deeply afraid. Even after a longer period of time, some people will go crazy and crazy.

This was invisible to Dulin. The joking voice and emphasis made her feel a little disgusted because she realized that this was an abnormal person.

But it is not surprising to think about it carefully. After all, Du Lin has many titles and titles. If he is a little normal, he will never be able to reach this point today - this is not a derogatory explanation.

Both inside and outside the door were silent for a moment, and Katerina turned around and left, patrolling the villa.

Not long after, the agents outside called back. They found the restaurant and arrested all the staff and the guests who were dining, and identified them.

There are no very special people among these people, and after friendly communication methods, there are no special discoveries.

Now these people have been transferred to the local police station for detention, and special agents have gone together to continue interrogating these people.

In the restaurant, they found a note discarded in the trash can, which read the time of ordering, the content of ordering, and the villa where Dulin currently lives.

According to the restaurant front desk, the man who called to order food was a man with a gentle voice. He sounded about thirty to forty years old. He spoke fast, but his pronunciation was very clear.

After hanging up the phone, Katerina kept thinking about a question: If the takeaway person simply attracted their attention, then there was no need for this.

With more means during the assassination, there will be more flaws that may be left behind. As a senior MIIS agent, Katerina has been working in counter-espionage and counter-terrorism investigations within the empire.

She knew very well that any extra action could be the key to solving the case, just like the news they received from the girl who answered the phone could already lock in the criminal's voice and roughly age.

This is not a good thing for the killer who is trying hard to hide himself. He exposed some personal information.

But if this person is useless... Katerina feels it is not right. This young man who delivers food will definitely have a certain effect in this assassination, but she still can't figure out what he is for.

If he let it go, it would be impossible. He has not completely cleared of his suspicion. The only thing he can do now is to temporarily detain him in the villa and make plans after dawn tomorrow.

"Come on your spirits, pay attention to your position, and call for support immediately if you have any circumstances!" Katerina repeatedly instructed her several times and began to patrol around the villa without letting go of any place.

Time passed by bit by bit, as if the assassination of the killer was just a wrong judgment they guessed out of thin air, or the killer had chosen to leave after seeing the strict security measures here.

Katerina was a little anxious. The more calm she was, the more she gave her a sense of urgency, as if the killer could appear in this villa anytime, anywhere.

At around 2 o'clock in the evening, an almost inaudible sound came from the confined window in the kitchen. In the gap less than a millimeter between the window and the windowsill, an iron wire quietly penetrated in. The iron wire was at a ninety-degree angle. After most of it was penetrated, the horizontal right-angle iron wire slowly rotated.

Part of it slowly moved upwards and was already against the latch of the window.

The movements of the shadows that were so blurred that they were almost invisible outside the house were quite slight and patient.

Just a little bit, I pushed the latch silently open, and then a gust of wind blew the curtains. Something squeezed in outside the window less than 35 cm long and wide.

The curtains were deformed by the roof, and a pair of feet had already fallen on the cabinet.

The next second, a smooth head appeared behind the curtains, and he jumped down like a cat without making a sound.

The takeaway guy locked in the kitchen was lying on the bar and slept soundly. He walked over gently, standing behind the guy like a ghost, his left hand passed through the gap between his arms and neck, and then suddenly pulled back!

At the same time, he pressed his head with his right hand and twisted it gently. The takeaway guy didn't make a slight sound, and the power of resistance disappeared completely.

He quickly took off the takeaway guy's clothes, stuffed him into the cabinet to hold utensils, then changed into the guy's clothes, put on a yellow safety helmet, and lay down at the place where the guy was sleeping just now.

At this moment, he counted silently in his heart.

ten……

Nine……

eight……

...

three……

two……

one……!

With a loud bang, the boiler in the basement of the villa suddenly exploded violently. If there were professionals on the scene, they would definitely be able to tell others as soon as possible that this must be caused by excessive internal pressure of the boiler.

Yes, the wrench comes in handy!

After his careful observation and planning over the past two days, he even bought the same boiler to try it out. He had figured out how long it would take for the boiler to explode when it could not be relieved. Then he completely locked the pressure relief port outside the villa to death.

The explosion alarmed all the agents in the villa, including Dulin, who were alarmed.

When Katerina and Dufo rushed into the basement, an agent on duty was already in a pool of blood.

The explosion of the boiler is like a huge bomb, and it is impossible for people who are close to it to have any chance of survival.

Dufo stepped forward and checked the vents and water inlets regardless of the steam and boiling water. There was no damage. Katerina was watching behind him.

The two of them ran upstairs almost at the same time. If this was not an accident, it must have been an accident to attract their attention!

But they didn't pay attention. Next to the boiler room is the villa's constant temperature system, and the constant temperature system and the boiler are actually connected.

It may not be used in summer, but in winter, the constant temperature system will send steam and hot water to the entire building through a water circulation system buried in the walls and floors, keeping the temperature in the entire villa at a suitable temperature.

In summer, these do not need to heat the villa as a whole, so a water inlet valve in the circulation system will be closed.

At this time, the boiler had completely exploded, and the water outlet of the water circulation system and the water outlet of the boiler were connected together. The water distributed in various pipes in the villa in the entire water circulation system is rapidly losing.

After losing this ice water, the temperature in the villa began to rise significantly. It was dark at this time, and the people in the house could not see it at all, nor could they notice that there were some small things of different sizes and shapes on the walls, eaves, and in some special places outside the villa.

The locations where these things exist have one feature - they are all located in the ventilation vents of the ventilation system.

Because Dulin's villa is much larger than ordinary villas, some rooms in the house cannot be directly connected to the outside world, so the ventilation system needs to be used for regular ventilation.

At this time, the temperature in the house increased, and the wind blowing during the exchange was no longer cooler. Suddenly, something that was the size of a fist was hanging under the vent, and then the smoke became thicker and thicker. The thick smoke was swept into the vent during ventilation!

Katerina, who was guarding the first floor of the villa, searched several times and found nothing, but at this moment, she and the others suddenly coughed a few times, and then they were frightened to find that some white smoke began to spit outwards from the cracks in the doors of some rooms.

Katerina's face turned dark. They were here to protect Dulin from assassination by the killer, not to fight against biological and chemical weapons. Who would wear a gas mask at this time?

Katerina was caught in the trade-offs when she thought that the killer was most likely to enter the empty villa after they left.

It was to take Du Lin away with him to avoid causing a one-on-one situation with the assassin.

It is better to let Dulin stay in the safe house and wait for rescue.
Chapter completed!