>>> FROM CBS NEWS BAY AREA, THIS IS THE EVENING EDITION. >> WE BEGIN WITH A DEVELOPING STORY. ANOTHER BAY AREA POSTAL CARRIER ROBBED. GOOD EVENING. I AM RYAN YAMAMOTO. THIS IS AT LEAST THE EIGHTH CARRIER TARGETED IN THE PAST WEEK. JOSE MARTINEZ IS AT WALNUT CREEK WHERE THE POSTAL INSPECTOR MADE ANOTHER DISCOVERY. >> Reporter: I AM STANDING RIGHT HERE IN THE 500 BLOCK OF NORTH CIVIC DRIVE WHERE YOU CAN SEE OVER HERE A FEMALE POSTAL WORKER JUST BECAME THE LATEST VICTIM OF AN ASSAULT AND ROBBERY. IT IS A PROBLEM THE USPS IS TAKING VERY SERIOUSLY WITH INSPECTORS AND POLICE OFFICERS WORKING EXTRA HARD TO FIND THE SUSPECTS. IT IS ANOTHER DAY IN THE LIFE OF MATTHEW NORFLEET, A U.S. POSTAL INSPECTOR. >> WE ARE RESPONDING TO A REPORT OF A LETTER CARRIER ROBBED HERE IN THIS PLEASANT NEIGHBORHOOD, NICE PART OF TOWN. THESE ROBBERIES ARE HAPPENING ALL OVER THE PLACE. >> Reporter: THEY HAVE TO REACT IMMEDIATELY. HE SAYS IN THIS CASE, FOUR MEN ROBBED A POSTAL WORKER WHILE DELIVERING THE MAIL. THEY STOLE HER POSTAL MASTER KEY. >> Reporter: WE WILL START LOOKING AROUND AND TALKING TO ANYBODY IN THE NEIGHBORHOOD, TALKING TO WHO WE CAN. I AM HERE AT THE USPS BUILDING IN RICHMOND, THE PLACE WHERE SEVERAL INVESTIGATORS ARE LOOKING INTO AN INCREASING NUMBER OF ROBBERIES IN THE BAY AREA. >> POSTAL INSPECTORS INVESTIGATE OVER 200 FEDERAL CRIMES RELATED TO THE SAFETY OF THE MAIL, BUT THE MOST IMPORTANT THING WE DO IS WORK TO PROTECT THE SAFETY OF POSTAL WORKERS WHILE THEY ARE WORKING. >> Reporter: MATT SAYS THIS IS NOT A NEW CRIME BUT IS BECOMING MORE COMMON BECAUSE OF DARK WEB SALES. >> THESE ARE COUNTERFEIT POSTAL KEYS. THESE MAY OR MAY NOT WORK IN A MAILBOX IN ANY COMMUNITY. THE PERSON SELLING IT TO YOU IS TRYING TO MAKE A PROFIT SELLING IT. THEY DON'T NECESSARILY CARE HOW GOOD THEY ARE. >> Reporter: A BIG PART OF THE PROBLEM, HE SAYS, WHICH IS WHY THEY HAVE A LINE DEDICATED TO YOUR COMMENTS IF YOU EVER SEE ONE OF THESE KEYS ON THE MARKET. IT IS THE ONLY WAY TO BATTLE THIS PROBLEM, HE SAYS. >> UNAUTHORIZED POSSESSION OF A POSTAL KEY, EVEN IF THERE IS NO PROOF YOU ARE THE ROBERT, UNAUTHORIZED POSSESSION OF THE KEY ITSELF IS A CRIME. IF ANY VIEWERS KNOW ANYBODY WHO HAS THESE KEYS WE WANT TO TALK TO THESE PEOPLE.
