The Aichi Prefectural Police confirmed that a body found Tuesday in the Aizuma River in Kariya is that of a 15-year-old high school boy who was allegedly beaten Saturday night by a group of teens and forced to swim across the river before disappearing in the water.

The body of Tatsuya Yoshida was found about 350 meters downriver from the spot where he went missing. The corpse showed no signs of serious injury, the police said. An autopsy will be conducted to examine the cause of death.

“I feel relieved they’ve found Tatsuya,” his mother told reporters gathered in front of the family’s house on Tuesday night, when she returned from a police facility where she identified the body.