On July 17, 2014, Eric Garner was stopped by New York City police officers for selling cigarettes. One of the officers placed Garner in a choke hold that killed him. The entire encounter was captured on cell phone video that went viral. Matt Taibbi, a contributing editor at Rolling Stone, discusses Eric Garner’s life and death and talks about the factors that led to the tragedy. His deeply-reported new book about the incident is “I Can’t Breathe: A Killing on Bay Street” (Spiegel & Grau).