The Crimes That Bind [Russian]

Michiko came to Tokyo to visit Hiromi, but is instead found murdered. The renter of Michiko's place is missing. The police is having a hard time finding clues and solving the case. There are not any clues and a connection between the dead and absent is not forthcoming. The only hint is an item found near the corpse, but it complicated the matters because it makes the file personal to one of the detectives assigned to the murder.