Tucson City Ct. Loc. R. 21
Rule 21. Default by the City
If no witness for the City, excluding the respondent, appears at the time set for hearing on a civil infraction, the court shall dismiss the complaint without prejudice, unless the court, for good cause shown, continues the hearing to another date. This rule shall not apply to those instances (such as civil parking infractions) where the citation constitutes prima facie evidence of the civil parking violation.