ST. PAUL, Minn. – A St. Paul man has pleaded guilty to the armed robbery of U.S. Postal Service employees on two separate occasions, announced U.S. Attorney Andrew M. Luger. According to court documents, on November 18, 2023, Rubin David Adams, 26, assisted another person who approached a letter carrier in Edina, pointed a handgun at them, and demanded the “mailbox key,” which the victim did not have. Instead, the victim handed over two sets of USPS vehicle keys. The following day, Adams himself approached another USPS letter carrier in Brooklyn Center. Adams pointed a handgun at the victim’s head, demanded and then stole two USPS mailbox keys. Mailbox keys are valuable to criminals who use them to steal mail, cash, checks, and other financial instruments. Mailbox keys are the property of the USPS, and it is a federal offense for an unauthorized person to possess one.