Female teacher who murdered a girl was already a time bomb... She destroyed a computer and assaulted a colleague = South Korea

A teacher in his 40s who stabbed and killed a first-grade girl at an elementary school in Seo-gu, Daejeon, had been showing abnormal behavior such as destroying computers and assaulting fellow teachers before the incident.
It was discovered that teacher A had been on sick leave for six months since December last year due to "depression," but had returned to work early, 25 days later.
On the 11th, Daejeon Office of Education Director Choi Jae-mo said in a press conference that Teacher A had "displayed violent behavior, including breaking the arm of a fellow teacher on the 6th of this month."
"Teacher A had been on leave due to depression and other issues and returned to work at the end of last year, but on the 6th of this month, he was found wandering alone in a dark classroom," Choi said.
When a fellow teacher saw him wandering around and said things like, 'Shall we leave work together?' or 'Shall we have a quick chat?', he put him in a headlock and grabbed his wrists tightly."
The school has taken measures to warn Teacher A, have him apologize to his fellow teacher, and have Teacher A sit next to the vice principal."
After grasping the situation on the ground, the Daejeon Western Education Office also ordered Teacher A to take leave.
In response, the two scholarship recipients were dispatched to the school on the morning of the 10th to inspect the site, but in the afternoon of the same day, Teacher A was found to be in the school's audiovisual room for 1
A 2nd grade girl was stabbed to death with a deadly weapon in a classroom. It was confirmed that teacher A had been the homeroom teacher for the 2nd grade students until he was placed on administrative leave. In addition, he had been suffering from depression for six months since the beginning of December last year.
"Under the rules regarding leave and reinstatement, if a teacher applies for reinstatement with a doctor's certificate attached, he or she will be reinstated within 30 days," Choi said.
"A medical certificate from a psychiatrist stating that he is able to live his daily life has been attached, and he was allowed to return to work based on this," he said, explaining the reason for the reinstatement.
However, the school assigned specialist subject matter teachers to teach, and the school has been on holiday since December 27th of last year, so no actual classes were held.
Director Choi said, "Teacher A was a quiet teacher with 20 years of experience without any unusual characteristics before he was reinstated. If he took his medication properly, he would be able to carry out his teaching duties normally."
Meanwhile, the Daejeon City Office of Education has decided to institute a mourning period from today until the 14th.