Crime and terrorism analyst Brad Garrett talks about the effort by Robert Kennedy Jr. to re-open the investigation into the assassination of his father. Bobby Kennedy was shot and killed in Los Angeles 50 years ago in Los Angeles and his assailant, Sirhan Sirhan, was convicted and is serving a life sentence. But RFK, Jr says after meeting with Sirhan and reviewing other evidence, he believes there was a second shooter that may have fired the deadly shot that killed his father.