William Bratton has been the police commissioner in New York, Los Angeles, and Boston. Now, New York City Mayor-elect Bill de Blasio has tapped him for the job once again.
He was Boston's 34th police commissioner and holds the Department's highest award for valor.
When he became New York City police commissioner in 1990, he and then newly elected mayor Rudy Giuliani had the unenviable task of making the city safe again. They did it.
There was tension between Giuliani and Bratton over who deserved credit for the plunging crime statistics and the police commissioner resigned under pressure.
While de Blasio has talked about concerns over racial profiling stemming from stop-and-frisk, Bratton actually expanded the program in Los Angeles. But in his final year, 30% of stops led to arrests, whereas in NYC only 6% did, the NY Daily News reported.
Rev. Al Sharpton, an influential activist in the African-American community, said he and Bratton used to have a chilly relationship, but that it has since improved.
One of Bratton's major accomplishments is pioneering the use of the CompStat system of tracking crimes, which proved successful in reducing crime in New York City and is still used to this day.
Bratton has taken advantage of his success in law enforcement, penning an autobiography.
They love him in England. He was given the honorary title of Commander of the Most Excellent Order of the British Empire by Queen Elizabeth II in 2009.
But that's not all. British Prime Minister David Cameron wanted to name Bratton the new Metropolitan Police Commissioner for London in 2011, but was blocked on the grounds that the Commissioner must be a British national with experience of English law.
In praising Bratton, de Blasio dinged their predecessors, commissioner Ray Kelly and Mayor Bloomberg.
Adrian Carrasquillo is the White House correspondent for BuzzFeed News and is based in Washington, DC.
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