#Adachi

The suspect told police during voluntary questioning before his arrest on Wednesday that he strangled his 11-year-old adopted son following an argument on the drive to school.

As Yūki Adachi, the adoptive father of the boy, participated in the search for his son, he also may have tried to delay the discovery of the body, sources said.

Police believe Yūki Adachi may have murdered his son in a public restroom about 2 kilometers from the family's home.