Yuki Adachi, a 37-year-old company employee from Sonobecho, Nantan, was arrested in the early hours of April 16 on suspicion of abandoning the body of his son, Yuki, an elementary school student. Investigative sources said Adachi has also acknowledged killing the child during questioning. According to police, the suspect transported the body to wooded mountain areas and other locations within the city between the morning of March 23 and the evening of April 13 before leaving it in forestland in Nantan. Adachi has admitted the abandonment allegation and told investigators, in substance, that he acted alone. Police announced later on April 16 that a special investigation headquarters had been established at Nantan Police Station. Yuki was reported missing on March 23 after he failed to attend school. At the time, Adachi told police he had driven the boy to school by car. However, security camera footage near the school did not capture the child, and no witnesses reported seeing him that day. The body was discovered on April 13 in a lightly trafficked mountain forest area of Nantan, lying face up on the ground about 2 kilometers southwest of the boy's elementary school and roughly 8 kilometers from his home. Investigators said the body is believed to have been relocated multiple times before it was found. They suspect the repeated movement was intended to prevent discovery.