Officers re-arrested Shinya Nakao, the 47-year-old manager of a used goods shop in Chikugo City, and his 45-year-old wife, Chisa, for the murder of the husband of her younger sister, Sakae Hiyamizu, 36, who herself has been charged with manslaughter.
Between September and October of 2006, the suspects are alleged to have repeatedly beaten Kazuya Hiyamizu, then 34, and dumped his dead body in a storage house on the property of the shop.
All three suspects have refused to comment on the allegations.
Around October of last year, reports surfaced about a number of people related to the couple who had gone missing over the past decade.
On June 16, police first arrested the couple for the killing of Takashi Hidaka, a former employee, then 22, who was beaten at their apartment in early May of 2004. He died the following month.
Later in June, Shinya Nakao admitted to grinding the bones of multiple corpses with a machine and tossing the remains into a river near the home of his parents.
A search of the riverbed by investigators on June 12 revealed several human bone fragments. According to the Yomiuri Shimbun (Aug. 6), a DNA test performed on a bone fragment found in the river provided a match with that of Hiyamizu.
Police are now searching for the young son of Hiyamizu and his wife and another former employee of the shop.
