Goodbye to the chief

William J. Bratton has been the best thing that happened to the LAPD since William H. Parker, the man who created our modern Police Department over half a century ago. Bratton came to a city plagued by high rates of crime, rampant gang violence, the unhappy memory of the Rodney King riots, deep distrust between the police and the black community and a consent decree in which a federal judge made clear his intention to make wholesale changes in how we were policed.

Now he will leave a city -- for a job with a private security firm -- with a much lower crime rate, less gang violence, restored confidence between blacks and the police and progress in implementing (often for better but sometimes for worse) the consent decree, which was lifted last month.

I have no idea why he has decided to leave now except, perhaps, the thought that one ought to leave 'em laughing. Or, in this case, smiling in gratitude.

Bratton came out of a working-class Boston neighborhood. After serving in Vietnam, he became a Boston cop and quickly rose in rank. Within 10 years, he was the executive superintendent of that department, the youngest in its history.

In 1990, he became chief of New York City's transit police, where he adopted new tactics that ended graffiti on subway cars, stopped riders from jumping over turnstiles to evade the fare and restored order to the grim tunnels in which millions of New Yorkers waited for transportation.

Then he went back to Boston to head its Police Department. In 1994, he became the top cop in New York. That is where I first met him. He came to see me at a private meeting to say that he knew how to cut crime but most criminologists and many reporters didn't believe him. I told him that most criminologists and reporters didn't trust me either, and so we had a lot in common.

Working with Mayor Rudolph Giuliani, he developed tactics that the city's police force had not seen for many years. One was to focus on public order as well as major crime, in part because citizens valued order and in part because improving order might help reduce crime as law-abiding citizens made more frequent and peaceful use of the streets.

A dozen years before, George L. Kelling and I had published "Broken Windows" in the Atlantic, making just this argument, but when Bratton took over the NYPD not a single scientific study had been done to test our theory. That did not bother Bill.