At Tokyo Metropolitan University in Hachioji, Tokyo, a sociologist and professor Shinji Miyadai (63) was attacked with a knife and seriously injured. Interviews with investigators revealed that the building containing Mr. Miyadai's office had been invaded before.
The Metropolitan Police Department is investigating the suspicion that he was waiting for an opportunity to attack.
In November last year, Shinji Miyadai, a sociologist and professor of the university, was cut with a knife at the Minami Osawa Campus of Tokyo Metropolitan University in Hachioji, Tokyo, and was seriously injured for six weeks. A 41-year-old unemployed man who was found dead at his home in Minami Ward is investigating as being involved in the incident.
Investigations so far have confirmed that the man was walking back and forth on the university grounds just before the incident, but a week before the incident, he was seen breaking into the building containing Mr. Miyadai's office. Interviews with investigative officials revealed that it was captured on camera.
He broke in around 2:00 pm, wandered around the building for about 2 hours, then left the premises and entered the building again around 6:30 pm.
The Metropolitan Police Department suspects that he was waiting for an opportunity to attack a week ago, and is investigating in detail.
In addition, as a result of matching the DNA type detected from the plastic bottle that the man seems to have thrown away with the type of his parents, it was found that there was no contradiction as a parent and child. It is a policy to send documents for inspection.