 The series of massacres led the USPS to issue a rule prohibiting the possession of any type of firearms (except for those issued to Postal Inspectors) in all designated USPS facilities.In 2016, video footage was released showing a group of police officers from the New York City Police Department (NYPD) arresting a USPS worker while he was in the middle of his deliveries.The footage showed that the officers were dressed in civilian clothing.