CSI的問題...

CSI is not a specific department of the US but rather is rather a crime scene technicians department that exist in every police department around the world.
For example, FFEB(軍械法證科) & IB (鑑證科) of the Hong Kong Police Force and FSD(法證事務部) of the Government Laboratory(政府化驗所) are the CSIs of Hong Kong.
http://www.police.gov.hk/hkp-home/chinese/org/bdept.htm
http://www.govtlab.gov.hk/chinese/abt_fsd.htm
Requirements differ depending what position you want to be employed with (ie. Chemist, Toxicologist or fingerprint technician, etc) .