It is the duty of the Police Department to apprehend and arrest on view or on warrant and bring to justice all violators of the ordinances of the City; to suppress all riots, affrays and unlawful assemblies which may come to their knowledge, and generally to keep the peace; to serve all warrants, writs, executions and other processes properly directed and delivered to them; to apprehend and arrest persons violating Federal or State law as provided by law, and to turn them over to proper authorities; and in all respects to perform all duties pertaining to the office of police officers. The Police Department has charge of and operates the City jail. (1988 Code § 13-302)