Here is the link to report it to Dell. Sorry about your loss....
Community Member Since 2003
First report to police and then Dell Customer Service. From your manual:
The Dell customer service representative will log your report under
the computer Service Tag and record the computer as missing or stolen.
If someone calls Dell for technical assistance and gives your Service
Tag, the computer is identified automatically as missing or stolen. The
representative will attempt to get the phone number and address of the
caller. Dell will then contact the law enforcement agency to which you
reported of the missing computer.