Actually, depending on just how your friend sent the laptop, i.e. surface mail, then 3 months would be right on target. Since you have the tracking ID, you need to go to www.usps.gov
, and fill out a PS form 1510 Mail loss and Rifling Report. If your friend sent the laptop with Insurance, he can go to the local post office and file a claim. The US Postal Service take a very dim view on mail fraud.
As mentioned above, the usps only has control of mail on US carriers, once the mail enters a international system, it becomes another issue.