Senior Forensic Chemist Jack 'Pro Sir' Po is the head of the Forensic Department and is skilled at analysing criminal psychology. He has a unique view on human nature and is familiar with the structure of various firearms. Pro Sir works closely with Senior Pathologist Mandy Chung in a wide range of fields including psychology, anthropology, criminology and forensic science.

• Lai Yiu-Cheung
• Maggie Cheung Hoh-Yee
• Kate Tsui
• Ron Ng
• Nancy Wu
• Aimee Chan
• Edwin Siu
• Ram Chiang