Reserve officers shall have the following powers of arrest and none other:
   (A)   He or she may arrest for a public offense committed in his or her presence;
   (B)   He or she may arrest a person who has in fact committed a felony, although not in his or her presence;
   (C)   When a felony has in fact been committed, he or she may make an arrest when he or she has reasonable cause for believing the person arrested committed it;
   (D)   He or she may lend physical aid to any regular member of the Police Department in making any lawful arrest, when authorized by the Chief of Police or requested by any member of the Police Department.
(`83 Code, § 1-1315)