Ability to: research, analyze and apply legal principles, facts, evidence and precedents to legal problems; prepare and present statements of law, fact and argument clearly, logically and persuasively in written and oral form; establish and maintain effective working relationships with staff members, departmental representatives, county officials, the courts, law members, departmental representatives, county officials, the courts, law enforcement agency officials, and the general public; understand and accept differences in human behavior, and cultural and ethnic backgrounds. Working knowledge of: the duties, powers limitations, and authorities of the Office of the District Attorney; the principles of criminal law, principles of trial procedure, and rules of evidence; legal research methods and judicial procedures; written and oral communications, including language mechanics, syntax and English composition.