Over the years, author, journalist and podcaster Malcolm Gladwell has written about some notorious cases of police brutality, including the deaths of Amadou Diallo, the African immigrant who was shot 41 times by New York police officers when he reached for his wallet to show them his ID, and Sandra Bland, the black woman who died in a jail cell after being arrested for a routine traffic violation. Gladwell is famous for mining behavioral science for his work — including his books "The Tipping Point" and "Outliers," and his podcast "Revisionist History" — and when it comes to understanding the intersection of crime, violence, and policing, he turns again and again to criminologist Frank Zimring. A law professor at the University of California, Berkeley, Zimring has had a long academic career examining policing, gun violence, crime rates, and the social factors that interact with each of them. In 2017, he published a book called "When Police Kill," one that Gladwell believes is especially important to read as the police killing of George Floyd sparks debates about defunding police departments. —This author recommends— When Police Kill —More from this author— Interview: 'Why Do Police Do Traffic Stops?' Journalist Malcolm Gladwell On Rethinking Law Enforcement