At UNLV you meet Professor Franklin. He specializes in "Theory Reconstruction". First, fingerprint the soda can and then chat with Franklin.

which computer? this one.
who used? John Laskin was on it.
What research? unsolved crimes
Where find him? Lives on campus
Who has access to lab? Criminal Justice students, grad only
What access do you have? I have keys to lab and building 24 hrs
Jefferey Deschamps? My first big success, I wrote the book on it.

In the lab, you learn that there are no matches on the can print fingerprints - and that they don't match the other can's prints. Hmmmmmmmmmmmmm.

Talk to the cop about John Laskin, and he agrees to bring in John for interrogation.

CSI Crime scene Investigation Walkthrough