Well it's been five months and the criminal is unsurprisingly still at large.  Check out the "9. TERM AND TERMINATION" section of WhoisGuard's terms of service, and the "12. NECESSARY DISCLOSURE" section of WhoisGuard's privacy policy.  Seems like it would be fairly straight forward for a law enforcement agency to request this information, and maybe even civilians if BT broke their terms and conditions.  Has anyone approached any authorities at all?