Losing a grandmaster key to a campus building involves expensive refitting of all locks affected and the replacement of master and submaster keys that can cost upward to a million dollars or more.

DENVER (KDVR) — A problem is brewing at Denver’s East High School, where several master keys to internal doors are missing. Replacing them could cost the school hundreds of thousands of dollars.

A group of thieves cleaned out an entire row of mailboxes using just one key, but now the United States Postal Service is taking action to fight back and protect your mail. Channel 9′s Eli Brand spoke ...