The devil's flute murders

In 1947, Kindaichi is consulted by 20-something Mineko Tsubaki. Her father, Hidesuke, a flautist and composer, disappeared the previous spring, and his corpse was found six weeks later. The official verdict was that Hidesuke poisoned himself, but Mineko and her mother, who believe the corpse was misidentified, suspect he may still be alive.