The people outside the door seemed to be a little hesitant and didn't do it for a long time

"Is it really necessary to kill her... She's just... And in the past few days, she is still a good person..."

Outside the room, the temperature was about minus ten degrees, this kind of cold weather, it seemed that it could freeze everything, a cold wind blew away the murderer's remaining hesitation, making its frozen heart more calm and firm, only a strong killing intent gradually condensed in the heart.

"No, they all deserve to die!"

The Black Shadow holds a plastic bag containing a colorless and transparent liquid, which is divided into two parts, each containing a different liquid, which, when mixed, produces deadly gas.

……

"No matter how small the crack in the door is, as long as I stuff this liquid in it, and wait for the two liquids to mix and vaporize to produce poisonous gas, you will pay for what you did."

The black shadow stood in front of Xiao Yanran's door, stuffed the plastic bag containing the liquid into the only small gap under the door, and then tore the plastic bag.

Xiao Yanran suddenly smelled a pungent stench

"What's that?" When she first noticed it, her nose inhaled some foul smell again, and suddenly, Xiao Yanran felt as if her chest was being weighed down by a heavy object.

Xiao Yanran felt very uncomfortable and painful, just gasping for air, like an asthma attack, although she tried her best to breathe, but she couldn't breathe in any air, no, it should be said that no matter how she inhaled, the air was full of that pungent and choking smell, and her head began to buzz.

Xiao Yanran fell to the ground and swirled, her hands and feet gradually stiffened.

"What the hell? Why is it so uncomfortable? Did the oxygen in the room suddenly disappear? ”

Xiao Yanran instinctively wanted to breathe air outside, she knew that the window could not be opened, and immediately rushed to the door, but the front of the door was full of tables and chairs that she had placed herself, Xiao Yanran tried hard to move them, but the table did not move, because her hands and feet could not exert any strength, she fell to the ground again, her throat began to wail, and struggled hard to get up again.

At this time, she noticed that someone had stuffed a small crack under the door into a plastic bag, and the liquid in the bag had penetrated into the room along the mouth of the bag.

"Is this something that makes me feel like I can't breathe? Is it poison gas? No! I don't want to die yet! ”

However, Xiao Yanran did feel the coming of death

"It's so hateful, who the hell is it? Who the hell wants to kill me? ”

No matter what Xiao Yanran thought, she still couldn't think of who was going to do this to her.

"I should have left something behind! If you die like this, it's worthless..."

At this time, Song Xiaofang next door also faintly smelled the smell, and ran to the corridor with Su Yalan to observe the situation, and found that Xiao Yanran's room seemed to have any sound, and hurriedly knocked on the door and shouted

"Miss Xiao, what's wrong with you? Open the door! ”

At this time, Xiao Yanran, who was lying on the ground, no longer had any strength to open the door, and her consciousness had begun to blur

"Little Fang? Is it Song Xiaofang? The man... That man's words will definitely not be a murderer, I believe that he is definitely not a murderer, hurry up and leave some information for him, but what should be left? I didn't see the murderer's face at all, anyway, it was about the reason why I was killed. ”

At the last moment, when she was still conscious, Xiao Yanran knocked over the trash can and stopped the notebook from burning.

"Miss Xiao, Xiao Yanran! Open the door! Are you okay? ”

Song Xiaofang knocked the door, completely unaware of what was going on inside

"You answer! Speak! I'm Song Xiaofang. ”

When Song Xiaofang shouted so loudly, a stimulating smell suddenly came to his nose.

"Huh? Is that? ”

Song Xiaofang dodged suddenly, and then rushed to Su Yalan's side, and took her away.

"Little Fang? What do you want to do? ”

Su Yalan asked with wide eyes and puzzled.

"Stupid! It's all like this, will I still do anything to you? I noticed a strange stench at the doorway. ”

"What stink?"

"I've smelled it before, and judging from the current situation, something extraordinary is definitely happening."

The noise woke the others from their sleep, and gradually gathered at the door of Xiao Yanran's room.

"Little Fang, what's going on?" Yu Dongting asked anxiously.

Before Song Xiaofang could answer, with years of experience in chemical work, Yu Dongting immediately smelled the smell of poisonous gas and hurriedly shouted

"It's potassium cyanate! Be careful, everyone! ”

Fang Kexin was so frightened that he took a step back and screamed

"What? Potassium cyanate? Even potassium cyanate is used? ”

But he mustered up the courage, covered his mouth and nose, picked up the plastic bag, and ran out the door.

"It's new, it's dangerous! Be careful! ”

At this time, Lao Zhang brought the spare key, and after everyone pushed open the door with all their might, a stronger smell came to their faces.

"Yalan, stay outside the door and don't come in."

Song Xiaofang covered her mouth and nose tightly, rushed into the room, and came to Xiao Yanran's side, Xiao Yanran used her last bit of strength to murmur in Song Xiaofang's ear

"Notebook... The murderer—" and closed his eyes.

"Miss Laugh, Miss Laugh!?"

"Damn! The windows won't open. ”

Yu Dongting scolded, quickly took off his clothes, carefully wrapped his right hand, used all his strength, and smashed the glass with one punch, and after the wind blew in, the smell in the room suddenly became much lighter.

"Little Fang, Miss Xiao is dead, let's go to the first floor first, and wait for the poisonous gas in this room to dissipate before coming in to investigate."

Song Xiaofang secretly hid the half-burned notebook and nodded sadly.

"I can't stand it anymore! How many people is that madman going to kill! ”

Su Yalan, who had always been gentle, finally broke out, with tears in her eyes, kneeling on the ground and shouting.

Song Xiaofang walked up to Su Yalan and patted her on the shoulder

"Yalan, it's full of poisonous gas, don't open your mouth and yell, let's go down first."

Su Yalan slowly raised her head and found that Song Xiaofang had become like that again, with an expressionless face and sharp eyes, but there was no murderous aura, but it gave people a very reliable feeling

"Little Fang..."

"Don't worry, I will definitely catch the murderer and avenge Miss Xiao."

The second floor was filled with poisonous gas, and everyone came to the first floor, and then Fang Kexin also came back, Yu Dongting asked

"How? Nothing, right? ”

Fang Kexin nodded

"Well, I deliberately threw the plastic bag far away and buried it, it should be fine, don't worry."

Yu Dongting nodded

"Thank you for your hard work."

"That..."

Yu Dongting looked at Fang Xin and stopped talking, and raised his head and asked

"What's wrong? Can I help you? ”

"I... I just saw a figure, on the other side of the river, looking like... Like..."

"Who is it?" Yu Dongting and Song Xiaofang slapped the table at the same time and asked

Fang Kexin was obviously frightened by the two of them, and said stumblingly

"Look, look like Han Chen... I'm not sure, though. ”

Hearing this name, Song Xiaofang felt a little strange

"Could it be that there are two murderers? One is Han Chen, and the other is the one who chased me and Yalan with a gun? ”

Yu Dongting calmly analyzed

"If he put poison gas at Miss Xiao's door and ran away immediately, counting the time we found out, plus the time for Fang Kexin to run out of the door, it was about 40 minutes, Lao Zhang said that it would take an hour to detour to the opposite laboratory from here, and the time is very consistent."

Su Yalan asked puzzled

"You mean he's going to that lab? What is he doing there? ”

Lao Zhang knows this better

"It's very cold at night here, and in addition to this villa, the only place to live is the laboratory opposite."

"Good! Let's go find him! Yu Dongting stood up and said firmly, and after speaking, he looked at everyone, his eyes were asking, who else would accompany him.

Song Xiaofang has been timid since he knew that the murderer had a gun in his hand, but now that he knows where the murderer is, if he still lets him go, I don't know how many people he will kill, especially Su Yalan has become his target, even if it is for the sake of the woman he loves, he should have the courage to go.

"I'll go too!"

Later, Lao Zhang and Fang Kexin hesitated and decided to go, and Qiqi glanced at Su Yong

"What, aren't you going?"

"I... I..."When Su Yong was spitting, Song Xiaofang took the initiative to say

"Forget it, you three girls don't go, there must always be a man in the house to take care of you."

Su Yong didn't expect Song Xiaofang to relieve himself from the siege, and he still had a trace of gratitude to him, so he hurriedly said

"Yes, yes, that's what I mean."

After all, the other party may have a gun in his hand, and the four of them are still very cautious, and one of them took a weapon in his hand, ready to catch the terrifying demon.

Before going out, Su Yalan said worriedly

"Xiao Fang, you must be careful, that person kills people without blinking, and..."

"If there is danger, you run quickly, don't risk it, something... Something for them to get on. ”

Su Yalan also felt that it was not good to say this, and there was apology in her tone, and Song Xiaofang smiled after hearing it

"Don't worry, so are you, close the door after we leave, and we must not open the door until we come back."

said and hugged Su Yalan, Su Yalan didn't react much, just nodded and said

"Well, don't worry, I'll take care of myself."

After hugging, Song Xiaofang began to hey silly music

"You won't refuse to hug you now, have you already started thinking about being my girlfriend?"

Su Yalan was so angry that she almost scolded

"You, you person, this situation is still a joke,..."

After the four of them left, the four people in the room also closed the door and sat quietly on the first floor, waiting for them to come back without saying a word.

On the way, Yu Dongting laughed

"Little Fang, are you happy? It seems that the relationship between you and Miss Su is warming up quickly. ”

Song Xiaofang also felt this way and said excitedly

"yes, if only it could go so smoothly all the time."

"Let's get to the point, let's say the murderer has a gun, why don't you use it all the time?"

Yu Dongting's question brought Song Xiaofang, who fantasized about the future with Su Yalan, back to reality and analyzed it calmly

"In the first case, I was supposed to want to disguise it as a suicide scene, so I didn't use a gun; The second case should be that the crime was committed in too much hurry, and if there was blood on the body, it would be difficult to deal with it, so he chose to strangle him; Miss Xiao's case just now should be that he can't enter the room, so he can only use poison gas. However, why did the murderer have a way to enter Guan Shuang's room, but not Miss Xiao's room? Is it simply because of the table, chairs and bed at the door? ”

"Well, your analysis is very correct, what about Zuo Hongyi? Why not use a gun that time? ”

Song Xiaofang shook his head, saying that he hadn't thought of it yet.

Yu Dongting said meaningfully

"Let's say the killer wants to use the gun as a killer and deliberately lets us discover the glass cone, and that makes sense."

Song Xiaofang stopped and looked at Yu Dongting in surprise

"Deliberately let us find out, you mean?"

"Planting blame."