Maryland Criminal Law Section 9-301

      (a)      In this subtitle the following words have the meanings indicated.

      (b)      "Official proceeding" includes a criminal trial, a hearing related to a criminal trial or adjudicatory hearing, a grand jury proceeding, and any other proceeding that is part of a criminal action or juvenile delinquency case.

      (c)      "Victim" means a person against whom a crime or delinquent act has been committed or attempted.

      (d)      "Witness" means a person who:

            (1)      has knowledge of the existence of facts relating to a crime or delinquent act;

            (2)      makes a declaration under oath that is received as evidence for any purpose;

            (3)      has reported a crime or delinquent act to a law enforcement officer, prosecutor, intake officer, correctional officer, or judicial officer; or

            (4)      has been served with a subpoena issued under the authority of a court of this State, any other state, or the United States.