The service of a subpoena is the process by which the attendance of a witness before a court or magistrate is required is a subpoena. (
PC 1326) Instructions for service are seldom received. An original subpoena and a copy for each witness is necessary. (
PC 1328)
The following may issue subpoenas in criminal cases:
Attorney of Record for the Defendant
Court Clerk
District Attorney
District Attorney Investigator
Magistrate
Public Defender
Public Defender Investigator