I think you came here with your girlfriend Miss An Mei, right?
The coffee with sleeping pills in it was your way of making her faint.
Once she's drowsy, you put her in the driver's seat and tape all the windows shut.
Then use a blade to cut the tape on the passenger side along the gap of the car door, and then apply a layer of tape on the gap from a vertical direction to cover the cuts of the tape.
Afterwards, you lit the stove to create the illusion that Miss Anmei committed suicide by burning charcoal and suffering from carbon monoxide poisoning.
After completing all this, you drove away in the red car you rented and found the "famous detective" Kogoro Mouri as your witness.
Once he was sure the driver's side of the car door was sealed shut with tape, he broke through the windshield and entered, then cut through the outermost layer of tape, completing the closed-room murder.
"I see. When I saw Miss An Mei sitting in the driver's seat, I subconsciously wanted to open the door closest to her. And when I saw the tape on the passenger seat across from me through the window, I naturally thought it was also sealed tightly."
Hondou Eisuke suddenly realized, "As long as the tape is compacted and cut, it won't be discovered that it was just a layer on the surface, right?"
"Yes, but if someone notices the cut in the tape, they'll be able to spot the problem."
Tang Ze opened the passenger door and pointed at the cut at the edge of the door.
Shancuncao stepped forward to check the tape and nodded, "That's true. The cuts of tape applied horizontally and tape applied vertically are completely different."
"This is the evidence of another cutting!" Hondou Eisuke couldn't help but agree after he stepped forward to check.
"So the seat not fitting the victim's physique, and the wrinkles on her coat, are all because this was a closed-room murder disguised as a suicide..."
When Shancun Cao said this, he looked at Sanjiao Du, with no concealment of the scrutiny on his face.
"I just did all this to get my girlfriend out of the car as quickly as possible!" Sanjiao Du looked at everyone and questioned, "Is it wrong for me to do this? This is too ridiculous, right?
Besides, these are just your speculations. Do you have any evidence to prove that I killed that person?
This method would work even if it was used by someone else, right? What if someone else killed someone and just happened to catch me here? "
"It seems you won't give up until you reach the Yellow River." Facing Sanjiao Du's stubborn resistance, Tang Ze smiled and said, "Isn't the evidence in this ashtray?"
As he spoke, Tang Ze leaned over and opened the lid of the ashtray in the car, and took out a crumpled letter from it.
"Isn't there a cigarette lighter in Miss An Mei's bag? The reason she did this wasn't to stop you from smoking, but because she didn't want you to see this breakup letter before she got off the car."
Tang Ze's words made Sanjiao Du's face change, but he could only watch the other party read out the contents of the letter.
"You said you'd take me to that place in order to return us to who we once were, but I've already changed. I'm sorry, Anmei."
She didn't say much, but the information contained in it showed that the reason she came to this place was because Sanjiao Du brought her here to save their relationship.
This alone is enough to identify Sanjiaodu as the number one suspect.
"This is a trap! It must be a trap set by An Mei!"
After listening to his father's words, Sanjiao Du refused to take her life and continued to argue, "She must have set up a plan to kill herself so that it would look like I killed her. This is to get revenge on me!
The same thing happened with the tape cuts. Since there was always a box cutter in the car, she must have guessed I would use a knife to cut the tape. The same thing happened with the message, it was just to pin the blame on me!
"If you still don't give up, then I'll let you accept your fate."
Tang Ze looked at Sanjiao Du's quibbling with a cold eye and displayed the dark green letter in front of everyone: "The real evidence is not the content of the letter, but the paper cover used to write the message!
I believe you have all seen it. This is the paper cover that the bookstore puts on customers when they buy books.
I think this should be the book cover of the novel released today in Miss An Mei's bag.
The forensic personnel did not collect anyone's fingerprints on the tree when they were collecting fingerprints before because you wiped them off.
It was the fingerprint you got on her when you bought the book for her and gave it to her on the way here.
However, you may have forgotten, or perhaps you forgot to wipe off the fingerprints on the book cover that Miss An Mei secretly left in the ashtray box after she wrote the breakup letter.
You said, how come your fingerprints were found on the cover of a novel that was released today, even though your girlfriend disappeared in her car the moment she got up this morning?
"But how can you confirm that it's the cover of the novel you want to release in the bag?"
Sanjiaodu continued to quibble, as if he would not give up until he reached the Yellow River. He would keep quibbling when he found a little loophole.
"As a mystery novelist, I can actually explain this to you."
Unfortunately, Tang Ze had seen too many criminals like this before, and he had confronted him directly, so he wasn't afraid of him making excuses: "When a novel is released, even if it's a sequel to the same novel, there will be some deviation in thickness.
Therefore, the book covers used by bookstores to wrap books are naturally newly wrapped according to thickness.
In other words, there are not many book covers that completely match the novel. If you still don't give up, we can go to the bookstore marked on the book cover.
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