Tomohiro Kato, the man who drove in an intersection in the Akihabara district of Tokyo, killing 7 people and injuring several other persons, was transferred, on Tuesday, from police custody to prosecutors.

According to The Associated Press, he was taken to a cell at the Tokyo prosecutors’ office in order to be interrogated about the Sunday attack. Authorities said the 25 year-old factory worker didn’t oppose his arrest but he wasn’t sorry for what he had done.

Evidence showed that he planned the attacked, posting several messages on the Internet, some of them just minutes before he went to the streets to randomly kill people.

He wrote more messages as he drove the 60 miles from his home in Susono, in the foothills of Mount Fuji, to Akihabara, a district of Tokyo known as the centre of Japan's geek subculture. When he arrived there he crashed his car into a group of shoppers and then got out of the vehicle with a long dagger and stabbed everyone in his path.

According to The Associated Press, police searched his apartment and found packages full of knives which they confiscated.

Osamu Namai, the company executive from the factory where Kato used to work, said that, two days before he went in Akihabara, Kato was so upset that his uniform was missing that he started screaming. Even though his co-worker went to find him a new one, Kato was already gone. Namai said that was his only outburst.

AFP reported that Kato described himself in his online postings as an ugly man without hope and friends, being used to act like a good guy.

“I'm lower than trash because at least the trash gets recycled. I'm accustomed to playing a good guy. Everybody was tricked so easily.”

Apparently Kato is desperate man in need of attention, but that doesn’t diminish the gravity of his actions. He knew exactly was he was doing.

The police didn’t file any charges against him. As he was transferred to prosecutors, they would have to file the charges in 20 days or, by Japanese law, release the suspect.