According to his guilty plea, the and a co-conspirator illegally possessed a U.S. Postal Service (USPS) “arrow key,” which they used to open USPS postal boxes and steal mail.  They then took the mail matter back to their residence and culled out any checks from the stolen mail.  The man and the co-conspirator then changed the names of the payees on the checks to their names or to the names other conspirators recruited to assist with the scheme. Source: US Attorney, District of Maryland