Sheriff's team turns up a thin internal file on former Deputy Achtyl
Amazon.com: Infernal Affairs (Wu jian dao) : Andy Lau, Tony Leung Chiu Wai, Anthony Wong Chau-Sang, Eric Tsang, Kelly Chen, Sammi Cheng, Edison Chen, Shawn Yue, Elva Hsiao, Chapman To, Ka Tung
Infernal Affairs (2002) - IMDb
11-year-old's song tells the story of a child's view of growing up in a police family