We have cheats for this game on Xbox, PC, and sometimes cheats from other systems may work on the PC version.
CSI: Crime Scene Investigation Cheats & Codes
Unlock All Bonuses
Once all 5 crime scenes are completed, you can go into your save game file and improve your score. Open the file in Notepad or a similar program. Scroll to the bottom of the page and the last few lines are your score and rating for each crime scene. For a perfect score set the following values: