Key Moments as the Derek Chauvin Trial Enters Day 7

Lawyers for both the prosecution and the defense continued to argue over whether Mr. Chauvin violated police policy when he knelt on George Floyd for more than nine minutes.

The chief of the Minneapolis Police Department and the doctor who pronounced George Floyd dead both testified in the trial of former officer Derek Chauvin on Monday, providing key support for prosecutors’ arguments that Mr. Chauvin’s actions last May killed Mr. Floyd. Here are some key takeaways as the trial enters Day 7. Lawyers for both the prosecution and the defense continued to argue on Tuesday over whether Mr. Chauvin violated police policy when he knelt on Mr. Floyd, asking a range of questions to the day’s first witness, a crisis intervention coordinator with the Minneapolis Police Department.