Any person, including the arresting officer and any member of the officer's department or agency, or any peace officer, who alters, conceals, modifies, nullifies, or destroys, or causes to be altered, concealed, modified, nullified, or destroyed, the face side of the remaining original or any copy of a citation that was retained by the officer, for any reason, before it is filed with the magistrate or with a person authorized by the magistrate or judge to receive a deposit of bail, is guilty of a misdemeanor.
If, after an arrested person has signed and received a copy of a notice to appear, the arresting officer or other officer of the issuing agency, determines that, in the interest of justice, the citation or notice should be dismissed, the arresting agency may recommend, in writing, to the magistrate or judge that the case be dismissed. The recommendation shall cite the reasons for the recommendation and be filed with the court.
If the magistrate or judge makes a finding that there are grounds for dismissal, the finding shall be entered on the record and the infraction or misdemeanor dismissed.
Under no circumstances shall a personal relationship with any officer, public official, or law enforcement agency be grounds for dismissal.
Ca. Veh. Code § 40500