PCCheats
CSI: Crime Scene Investigation

Walkthroughs and Guides
Outside link to all the information you'll need on this game, and more!
Includes cheats and links to cheats and hints..
Courtesy of: Gamefaqs.com

FILE EDIT
Please note: This procedure involves editing a game file, so it's best to create a backup copy of the file before proceeding. If you're not sure what you are doing then don't even attempt to try it.

HOW TO GET ALL BONUSES
Use a text editor to edit the your final saved game file in the game directory after completing the game.
Go to the bottom of the file and located the following lines and change them to match.
evd =100
hint= 0
ranking= 3
bonus= 10
score= 100
Also, the last bonus should set to 25.
This will unlock the extra bonus pictures and animated story boards.

Submitted by: Nightlore