Editor, the Tribune: The Columbia marijuana ordinances make absolutely no difference in whether parolees are sent back to prison for marijuana use. Contrary to the assertion in a Feb. 27 article in the Tribune, it is not true that a person on parole cannot have his parole revoked because he is charged under a city ordinance rather than a state law. When officers find people in possession of small amounts of marijuana, they routinely check their criminal histories. If the suspect is on parole, the police officer notifies the parole officer. [continues 167 words]