The younger son of the late Shah of Iran has committed suicide at the age of 44. He died at his home in Boston. He follows his sister, Leila, who killed herself in 2001. He fled Iran with his family in 1979 during the Iranian revolution. He earned degrees from Princeton and Columbia and pursued a Ph.D at Harvard. He never married and is survived by his mother, the former Empress Farah Diba, as well as a brother and sister.