George Floyd’s girlfriend testified yesterday on Day Four of former Officer Derek Chauvin’s murder trial in Minneapolis. Forty-five-year-old Courteney Ross tearfully told a jury the story of how she and Floyd met and how they both struggled with an opioid addiction. Chauvin is accused of killing Floyd by pinning a knee on his neck last May in a case that triggered worldwide protests over racial inequality. The defense contends it was Floyd's drug use and underlying health conditions that led to his death. CBS News Law Enforcement Analyst Paul Violas joins Tony to break it down.