MSNBC Live 07/08/16

'Tough time' for DART family

Gary Thomas, president of the Dallas Area Rapid Transit police, calls the tragedy "unimaginable" and says it’s a "tough time" for the DART family. Chief J.D. Spiller shares details about slain DART Officer Brent Thompson and calls the situation in Dallas a "gut punch.” ... more Duration: {{video.duration.momentjs}}