"What about you? Why are you here?"
"My name is Satoshi Murata. I came here to give a letter of apology to Instructor Nakatani. But I arrived early and the instructor didn't seem to be here, so I just stuffed the letter of apology into the crack of the door." said Satoshi Murata.
Fujiwara Yu looked around to make sure he didn't see any paper. He narrowed his eyes and spoke with suspicion:
"Are you sure you stuffed the letter of apology under the door? We didn't see anything under the door when we arrived at the scene."
Murata Satoshi couldn't help but get anxious when he heard this, and he raised his voice a lot to argue loudly:
"Impossible! I'm sure I slipped the letter of apology under the door. How could it be missing?!"
If what Murata Satoshi said is true, then his letter of apology could only have been taken away by the murderer.
Thinking of this, Fujiwara Yu did not hesitate to dump all the contents of the laundry basket onto the ground. At this time, he did not mind the dirtiness and searched carefully without missing any clues.
Finally, hard work paid off. A crumpled letter of apology was found inside a piece of clothing. The signature on the lower right corner was indeed Murata Satoshi's name, which proved that he was not lying.
"Fujiwara-chan, what are those stains on the paper? They don't look like traces of a red pen, do they?" Hagiwara Kenji asked.
It was with Hagiwara's reminder that Fujiwara Yu discovered a dark red mark in the lower right corner of the back of the paper. Having studied forensic identification, he quickly determined that it was not a mark of a red pen, but a bloodstain.
If this is the criminal's blood, the identity of the murderer can be confirmed through DNA testing.
"The amount of bleeding from the victim's head could not have caused such a small area of wipe-like bloodstains, and the murderer was so careless as not to dispose of this key evidence. It is very likely that the insignificant wound made him not notice it himself." Fujiwara Yu analyzed logically.
Hagiwara Kenji raised the corners of his mouth confidently, put his hand beside his mouth to cover his lips, and whispered:
"I already know who the murderer is."
Fujiwara Yuu was stunned as he put the key evidence into the evidence bag. He tilted his head slightly in confusion and said puzzledly:
"You can tell whose bloodstains it is with your eyes?"
"Of course not! If I had such great abilities, I wouldn't have missed out on the professional team!"
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