The Daejeon education office earlier said the teacher had requested a six-month leave of absence citing depression on 9 December, but had returned to school just 20 days later after a doctor assessed her as being fit to work.

During her time off work, she had suicidal thoughts, said Mr Yook, citing a testimony that the teacher had provided to police.

Days before the stabbing, the teacher had displayed violent behaviour, including putting another teacher in a headlock, said the education office.

Just like school shooters in America. Sign after sign was ignored.

she had purchased a weapon on the day of the attack and brought it to school - adding that she had planned to kill herself along with a child

Fucking why? It’s one thing to want to commit suicide, but why must people always try to take people with them. The kid wasn’t even targeted. The teacher just took the last student out and lured them to an isolated room. Humans aren’t well.

Consider me old-fashioned, but that should be illegal