A Denver man, Avian Mayo, 25, has been indicted by a federal grand jury on 21 counts that include postal robbery, brandishing a firearm during a crime of violence, bank fraud, and aggravated identity theft. The United States Attorney’s Office for the District of Colorado announced the charges.
According to the indictment, Mayo is accused of attempting to rob a postal carrier on March 4, 2024. On the same day, he allegedly robbed a second postal carrier. Two other individuals connected to these events—Brisa Sierra-Silva and Christopher Johnson—are charged in a separate federal indictment. Both Sierra-Silva and Johnson were indicted and appeared in court during spring 2025.
“The charges contained in the indictments are allegations and the defendants are presumed innocent unless and until proven guilty,” stated the press release from the U.S. Attorney’s Office.
The case is being investigated by the United States Postal Inspection Service along with the FBI Denver Field Office. Assistant United States Attorney Albert Buchman is prosecuting.
Case numbers associated with these indictments are 25-cr-00313-RMR for Mayo and 25-cr-00132-CNS for Sierra-Silva and Johnson.
