A chief of police is the title given to an appointed official or an elected one in the chain of command of a police department, particularly in North America. From Wikipedia
The late Keenan Darnell Anderson, a 31-year old teacher and cousin of the Black Lives Matter co-founder, was shockingly tasered six times during his arrest for suspected hit and run; the Police Chief's report indicates violations of tactical training and lethal force policies, leading to potential disciplinary actions against the involved officers.