Voice of a Murderer (Korean: 그놈 목소리; RR: Geunom moksori; lit. "His Voice") is a 2007 South Korean crime thriller film written and directed by Park Jin-pyo, starring Sol Kyung-gu and Kim Nam-joo.[2][3][4][5] It was the third top-grossing domestic film of 2007, with 3,143,247 tickets sold.[6][7] The story is a fictionalized account of the real-life kidnapping case of 9-year-old Lee Hyung-ho in 1991.[8][9]