William J. Bratton is currently the police chief of the Los Angeles Police Department. He served as New York City Police Department Commissioner from 1994 to 1996.

Bratton joined the Boston Police Department in 1970, where he was awarded the department's highest award for valour, and by 1980 had become Superintendent of Police, the highest sworn rank in the department.
He then served as Chief of the Massachusetts Bay Transportation Authority Police and then as Superintendent of the Metropolitan District Commission Police, which patrolled the Boston Metropolitan Area. From 1990 to 1992, he was Chief of Police for the New York City Transit Police.
Returning to Boston as Superintendent-in-Chief in 1992 he was named Boston Police Commissioner in 1993.
In 1994 he was appointed New York City Police Commissioner by Rudolph Giuliani. He left this post in 1996 after public disagreements with the Mayor. He worked in private consulting until becoming Los Angeles Chief of Police in 2002.

Bratton holds a Bachelor of Science Degree in Law Enforcement from University of Massachusetts. He is a graduate of the FBI National Executive Institute and was a Senior Executive Fellow at Harvard University’s John F. Kennedy School of Government, where he served as a Research Fellow.
His autobiography is entitled “Turnaround.”