However, after seeing the two key clues of the bloodstains on the beam of the bookcase and the knife stabbed horizontally in the back, Tang Ze basically figured out that the other party was able to remotely control the killing method while being far away in the Metropolitan Police Department.
The dead man, sweating profusely and collapsed next to the exercise bike, and the bookcase right behind him, are all part of the mechanism.
In order to "automatically" trigger this mechanism, another part of the mechanism is needed to "connect" them to make it work.
And the key is something hidden on the exercise bike.
Thinking of this, Tang Ze squatted down and checked the exercise bike next to the corpse.
Sure enough, at the lever connection inside the exercise bike pedal, Tang Ze found a large roll of rope wrapped inside, with a small ring knot at the end.
When these three clues are combined, the situation is actually very clear.
The reason why the bloodstain on the beam was only half was because the tape fixed to the thumbtack above was stained with another part of the bloodstain, which was then peeled off and taken away by Zengwei.
The other party's method of killing people from a distance is to fix a thin rope to the thumbtack in the middle above the bookcase, and then tie the other end to the exercise bike.
At this fulcrum, the bookcase can be easily pulled down to avoid accidents such as other ropes breaking.
Then place the knife horizontally on the top of the bookcase and secure it, then use some books or something to cover the protruding knife.
Then he took advantage of his wife's daily habit of exercising on an exercise bike and let her trigger the killing mechanism herself.
In the end, Mrs. Masuo used her bicycle to pull the bookcase over, and drove the knife fixed to the bookcase into her own back.
Before the plan began, Masuo came to the Metropolitan Police Department to ask the criminal to serve as a witness to prove his alibi.
The phone call and having Shiratori answer it was all to prove that the wife was still alive, so that it would be easier to frame the criminals later.
After returning to his own house, he was the first to enter the room, put the bookcase back in place, and removed the tape and thumbtacks that fixed it, creating the illusion that the criminals had invaded and wanted to silence him.
I have to say, this is an ingenious technique.
But unfortunately, I ran into this cheater Tang Ze!!
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