The Typo Collection Incident at the Conference Room

The meeting was held in the conference room next to the staff room. At the entrance, a program guide the size of a calligraphy sheet was displayed, with 'Incident Response Headquarters: Typo Collection Division' printed in block script. Along the route from the school gate to the conference room, several signs with pictures of index fingers were posted, much like directions to a funeral venue.
When the time came, a man took the microphone and began to speak.
"I am the father of Hiromi Goji from Class 1-2. First, please look at the screen."
Projected by the light of the projector was a page from a first-grade kanji workbook.
"As you can see, it says 'Three years on top of [ ].' My child wrote 'stone' (ishi). However, it was marked with a red pen. Perhaps the top of the second stroke looked like it was sticking out slightly, so they claimed it read 'Three years on top of right' (migi). Isn't that too harsh? What I want to point out is that someone intentionally tampered with the 'stone' to make it look like 'right'!"
The microphone was handed to the teacher who graded the workbook. "Sir, before speaking here, didn't you post this matter on social media with an image? I will be blunt: at first, it was even more 'right.' We have a copy. The post received a reaction, calling forth extreme replies such as 'I, too, have been burned by the stone and right' and 'The teacher from back then should die (tahine).'"
A stir went through the audience. The vice principal gulped. Would the culprit who wrote 'die' really be found through this method? Certainly, when I was a new teacher, I would nag students until I was blue in the face about the importance of stops, hooks, and strokes in Japanese class. 'Tahine' is not a typo. A 'typo' (goji) carries the nuance of 'I didn't mean it, it was a slip, I apologize.' So, no matter how interesting it is, the moment you know what you are doing, it is no longer a 'typo.' Yet, even though negligence is less sinful than intent, for some reason, people start wanting to claim they are clear-headed once they reach a certain point.
A man raised his hand. It seemed he was the culprit behind the post about being burned.
"I did it. Though, it was a different matter. It was three years ago. I thought it was just a careless mistake. I even thought it was a common case of mixing up right and left. However," he held something up in his right hand, "this 'stone' had been planted under the 'right' by someone's hand."
Fortunately, it seems there were no injuries, but fleeing in silence is not good. Besides, he accidentally bombed the wrong post regarding Mr. Goji's post. The results of the undercover investigation team at a later date were this very incident.

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