Newtown Police are investigating another case of mailbox vandalism.  The Newstimes reports that for at least the 3rd time in several months, a mail drop box was broken into and all the mail inside was taken.  The latest incident happened outside Edmond Town Hall overnight on August 19th.  Mailboxes are considered federal property.  The United States Postal Inspection Service says vandals face up to 250-thousand dollars in fines or up to three years in prison.  People who used the drop box are asked to monitor their financial/credit activity  Anyone with information about the vandalism is asked to call the U.S. Postal Inspection Service at 1-877-876-2455.