"Holy shit, what's the principle of this?" Li Dongliao put his head under the mirror and studied it carefully.
This kind of invisible words is a bit like the ones you can play in secret room games.
Use invisible ink of a special material to write on it, and as long as a specific mechanism is triggered, the words will emerge.
In order to take a closer look, Li Dongliao moved the cup closer.
As the heat in the cup continued to rise, the fog on the mirror became larger and larger, and the words on the mirror disappeared.
Those words flashed past, as if they were performing a trick in front of everyone, and then disappeared in an instant.
"What's going on?" Li Dongliao's brain was running rapidly.
He put on his gloves, carefully touched the surface of the mirror, then put it under his nose and smelled it, smelling a strong smell of raw onions.
Li Dongliao has been disgusted with green onions since he was a child. After smelling them, he immediately retched softly and reflexively.
"Oh my god, why does this mirror smell like green onions!"
"Smart technique." Tan Wan raised the corner of his mouth and smiled, staring at the mirror and saying thoughtfully.
"The smell of green onions is a clever technique?" Li Dongliao looked ferocious, "What are you talking about?"
"Haven't you heard of a joke on the Internet?" Tan Wan put one hand on his hip and used the other hand to pat his back gently to make him feel better.
"What?" Li Dongliao was dissatisfied and had a little temper. "Why are you playing riddles with me? Tell me quickly!"
Late talk: “The joke is that if you’re on a business trip and staying in a hotel, you can use lemonade to write on the mirror.
Write words like 'I died so miserably' or 'I died so unjustly'.
The lemonade will flow down during the writing process, and there will be no trace after the lemonade dries completely.
But as soon as subsequent guests take a shower, the indoor temperature will rise and the words will reappear, giving subsequent visitors the illusion that there is a ghost in the room. "
Li Dongliao blinked and looked at Tan Wan, so cold by the joke that he didn't know what to say.
"So..." Li Dongliao asked tentatively, "The word that appeared just now was also because of lemon?"
"It's not lemon. I guess the murderer used onions." Tan Wan crossed his hands on his chest and said confidently, "Don't you smell the onions?"
"Onions and lemons have the same effect, can they both achieve this effect?" Li Dongliao asked again.
“In fact, the basic principle is to make the surface of the mirror more hydrophobic. When other parts of the mirror are covered with water vapor, the painted areas will have less water vapor, thereby displaying the image.
It's not an advanced method. Once the heat brings enough water vapor, those words will still disappear. "
When Tan Wan said this, he added: "It's the same situation as He."
Those words should have been written by the murderer, just like the words the murderer left at the crime scene after killing Gao Miko, but the method used was different.
Li Dongliao: "But if we say this is a case committed by the same murderer, why are the killing styles so different?"
Tan Wan: "How to say?"
"The murderer tortured Gao Meizi and tortured the body, but he... Liu Xiaoyan..." Li Dongliao suddenly paused when he said this.
He originally wanted to say that the murderer's treatment of Liu Xiaoyan was very 'gentle'.
But the murderers have killed people. Killing a person cannot be called gentle in any way.
Li Dongliao adjusted his words before continuing: "The murderer only drowned Liu Xiaoyan, at least leaving a complete body for the deceased.
But compared with the death scene of Gao Miko, the bathroom at the crime scene was also cleaned very clean by the murderer. "
At this time, Tan Wan saw a thin and dry old man wandering around the rental house with his hands behind his back.
Tan Wan was attracted by him and pointed, "Who is this?"
The police officer who was taking notes replied: "This is the first witness and the landlord of this rental house. Talk to the team."
"Old sir, what do you call me?" The little old man's ears were not very good. Tan Wan had to shout several times before he responded.
"Hey! My surname is Shi!" the little old man said loudly.
Tanwan understands this situation. Generally, people with bad ears will speak louder.
Because they themselves cannot hear their own voices.
Tan Wan also raised her voice and said loudly in his ear: "Old man Shi, how did you find the body?"
Mr. Shi: "What did you say?? Louder!!!"
Tan Wan let out a long sigh. It was too hard to talk to this little old man!
Police officer: "It's like this. The sound insulation of this building is not good. The old man received a complaint from the guests downstairs that the quarrels upstairs were too loud. He asked him to go upstairs and have a look."
"Who lives downstairs?" Tan Wan asked, "When was the complaint made?"
The police officer lowered his head and flipped through the transcript, reading from it: "It seems to be around four o'clock in the afternoon."
Tan Wan raised his hand and looked at his watch. It was now nine o'clock in the evening.
While they were talking, Lao Zhang had already conducted a preliminary inspection of the body.
In addition to the strangulation marks on the back of the neck of the deceased Liu Xiaoyan, small bruises were found on the arms and near the collarbone.
It is speculated that the impact was caused by the deceased choking on water and resisting when the murderer committed the murder.
Apart from this, no other skin injuries were found.
"Preliminarily, it seems that he died from drowning. The specific results will be announced after I dissect the body and issue the autopsy report."
Tan Wan was worried, so he nodded and said, "I'll go back to the bureau and wait for your report."
As soon as he finished speaking, I heard Lao Zhang sigh. He took off his gloves and patted Tan Wan on the shoulder: "Team Tan is young and can still work hard. I am an old man and have to rest."
Liu Xiaoyan's body was transported back to the police station. Tanwan went down to the next floor and knocked on the door directly below Liu Xiaoyan.
A young couple opened the door. The woman was wearing sexy suspender pajamas and stood behind the man.
When the man saw that there was a man and a woman knocking on the door, he looked at Li Dongliao and blocked his wife with his body.
"Who are you?" The man said in a not very good tone, "Why are you still arguing so much?"
"We are police officers from the First Criminal Investigation Brigade, here to ask a few questions." Tan Wan showed his ID.
When the man heard that he was a policeman, his voice became more polite: "Uh, what's the matter?"
Tan Wan took back his ID and asked, "Liu Xiaoyan lives above you, how much do you know about this person?"
The woman replied: "It has been a few years since that woman moved here. The house she rented was not well waterproofed and leaked all the time. Because of this matter, my husband had to negotiate with her several times. Is it my husband?"
"Yes." The man confirmed the woman's words and asked, "What's wrong with this person?"
Li Dongliao: "She died. She was found dead in the bathtub by the landlord."
