His best bet is local law enforcement, but even this is likely a waste of time. What can they possibly do? They have a better chance of solving the crime from physical evidence than they do from electronic evidence.
He should file a police report for insurance purposes. Then just learn his lesson and move on.
Some thoughts for next time:
- Encrypt your hard-drive, especially on laptops or other portable devices. Check out http://www.truecrypt.org/
- Install a program to monitor/track your machine. Check out http://preyproject.com/