CSI: 3 Dimensions of Murder Hints

What evidence can I find here?

  • 1 of 3: Notice Alex's permanent cup of coffee. Watch for him to put it down.
  • 2 of 3: About the third time you go to talk to him (after you ask him for a DNA sample and he refuses), he'll put the cup down. Grab it!
  • 3 of 3: There's a fingerprint on it. To get a DNA sample, turn it so you're looking at the top and swab the sippy hole in the lid.