Contributor(s): William J. Bratton | From Tottenham to global terrorism, developing policies and implementing schemes that work across the range of fighting neighbourhood violence to combating international terrorism share common themes. Bill Bratton, CBE, will discuss his ideas about policing with purpose and collaborating to create a more secure future. William J. Bratton is the Chairman of Kroll the world's leading risk consulting company. He is known as one of America's premier police chiefs, the only person to have led the two largest police forces in the United States, the New York City Police Department and the Los Angeles Police Department and was named by Security Magazine as one of 2010's most influential people in the security industry.