evidence: The attorneys in the trial of former Police Officer Derek Chauvin, who is charged with murdering George Floyd, finished closing arguments Monday, turning over to jurors a case that has become the centerpiece in a high-stakes drama over race and justice in a nation with a troubled history of police brutality. [...] Prosecutors argued that Chauvin repeatedly violated police procedure and training when he arrived outside a corner store where Floyd had allegedly used a counterfeit $20 bill to buy cigarettes. During the trial, they repeatedly referred to the video of Floyd gasping and struggling to speak under what prosecutors said amounted to about 90 pounds of pressure, while Chauvin appeared calm, with his left hand in his pocket. [...] "A reasonable police officer wants to keep his fellow officers safe," said Nelson, who argued that volatile bystanders contributed to a chaotic situation that justified Chauvin’s actions before and during the time he knelt on Floyd’s neck to make an arrest. Chauvin declined to take the stand in his own defense.