Joivian Tjuana Hayes, who was a supervisor at the Costa Mesa Post Office, has pleaded guilty to stealing more than $300,000 worth of checks and valuables, according to the U.S. attorney's office.

A U.S. Postal Service supervisor from Compton could get two decades in prison after she admitted on Friday to stealing hundreds of thousands of dollars worth of checks and other valuable items out of the mail.

A United States Postal Service (USPS) supervisor pleaded guilty today to stealing approximately $284,000 in checks and up to $40,000 in other items – including gold and collector-type currency such as a Confederate $10 bill – from the U.