In accordance with 28 USC 566(c) and Federal Rules of Criminal Procedure, Rules 4 and 9, U.S. Marshals or their deputies are authorized to execute federal court criminal process.
A law enforcement presence is usually required in the execution of criminal process. Often the U.S. Marshal will be commanded by the court to execute this process. However, if service can more easily be effected by another law enforcement officer, the court or the U.S. Attorney may appoint or approve an alternate server.
Returns on all process executed by the U. S. Marshals Service will be promptly filed with the appropriate court. The U.S. Marshal is concerned with the returns only for process served by U. S. Marshals Service personnel.