The murder trial for former Minneapolis cop Derek Chauvin enters its third week today. Chauvin's defense team is preparing their witnesses for the next phase. The former officer is accused of killing George Floyd by kneeling on his neck last May. A key question that looms over the trial is whether Chauvin will testify in his own defense. He faces second-degree murder, third-degree murder, and second-degree manslaughter charges. The Minneapolis Star Tribune says Chauvin's testimony may not mean much given the bystander's video showing the officer's knee pinning Floyd to the ground for more than nine minutes. The defense is also expected to focus on the theory that Floyd died of a drug overdose.