 And then I will. To the best of my skill and judgment. To the best of my skill and judgment. Diligently and faithfully. Diligently and faithfully. Without partiality or prejudice. Mark Yamada was sworn in as the 18th chief of police for the county. He rose up through the department's ranks during the past 35 years and has specialized in community policing. Yamada replaces retiring police chief Marcus Jones, who will now head up security for the county school system.