Solomons Perjury (2015)

Soromon no gishou (2015) It is X-mas time and two students jump a wall by the school. To their shock they discover the body of a fellow student. The police, parents and school authorities are convinced of the boy's suicide, but just as the matter is about to be laid to rest several anonymous notes point an accusatory finger at other students. With the prospect of murder comes scrutiny and the students decide to take matters into their own hands and not wait for resolution which may or may not be coming.