Giuliani. He cooperated with Giuliani in putting the broken windows theory into practice and introducing the CompStat system.
Bratton resigned in 1996, while under investigation by the Corporation Counsel for the propriety of a book deal that he signed while in office as well as accepting multiple unauthorized trips from corporations and individuals. But the real problem was conflicts with Giuliani, because Giuliani was mad the Chief Bratton was receiving all of the credit.
Bratton worked as a private consultant with Kroll Associates, until he was appointed by Mayor of Los Angeles James Hahn as the LAPD's 54th Chief of Police in October 2002. Under Bratton crime dropped for 6 consecutive years. On June 19, 2007, the LA Police Commission reappointed William Bratton to a second five-year term, the first reappointment of an LAPD chief in almost twenty years. In March 2009, an amendment was proposed to the City Charter, allowing Bratton to serve a third consecutive term as Police Chief. On August 5, 2009, Bratton announced that after nearly seven years he would be stepping down as chief of police for the City of Los Angeles, and he continued to serve as chief until October 31, 2009. Bratton moved back to New York City to take a position with a private international security firm called "Altegrity," serving as a Chairman of a new division where he will consult on security for police departments