On Feb. 14 and 15, he took a handwritten letter to the official residence of the speaker of the Lower House, in which he suggested he was planning to kill people at Tsukui Yamayuri En at night when the facility had fewer staff on site, according to the police.
I dream of a world where the disabled can die in peace, Uematsu wrote in the letter. I will carry out the plan without hurting the staffers, and I will turn myself in after I kill the disabled.
The letter also said he felt sorry for people with disabilities, many of whom were bound to wheelchairs for life. He further wrote that many of them had no contact with their family members.
Uematsu had also been questioned by police on Feb. 19 for telling workers at the facility a day earlier that he would kill the disabled, according to Sagamihara officials.
Uematsu was hospitalized after that until March on the grounds that he was a danger to others. At the same time, he quit his job. Traces of marijuana were detected in his urine when he was tested at the hospital, police said.