Tech Support Catches Thief

This story from InfoWorld shows that crime doesn't pay.

After a thief stole a printer for making driver's licenses, his call to the manufacturer's tech support line requesting driver software lead to his arrest.

The story then goes on to say that although the thief had stolen the computer connected to the printer, the computer "was locked with a key".  I wonder if that was a key for a physical lock on the case which prevented the computer to boot up or an authentication key card?  The latter, of course, would have been much more difficult to bypass.