The decapitated head of a man found dead in a hotel in Sapporo, northern Japan, earlier this month has been discovered at the home of a doctor and his daughter, who were arrested on suspicion of mutilation of a corpse, police said Tuesday.The head was discovered Monday during a search of the property of the psychiatrist, Osamu Tamura, 59, and his daughter Runa, 29, in Sapporo. Also arrested Monday was Tamura's 60-year-old wife, Hiroko, who lived in the home, on suspicion of collusion.The police are investigating the relationship between the daughter and the victim, identified as 62-year-old…READ FULL ARTICLE