U.S. postal system being checked
A source familiar with the investigation tells CBS News all pieces of mail processed by the U.S. Postal Service are put through machines that photograph and document what they are, where they came from and where they’re headed.
It’s all a result of the post-9/11, post-anthrax world we live in, the source says.
Using what’s described as “data analytics,” investigators are now looking at mail processing facilities nationwide to check for packages that may appear similar to the others sent to top Democrats.
Security concerns kept the source form sharing specifics on how this is being carried out, but it’s one tool investigators are using to cast a wide net to quickly determine if there are any other suspicious packages out there.