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The second day of the trial of Derek Chauvin, the former Minneapolis police officer who is accused of killing George Floyd, was marked by emotional testimony from witnesses who recounted what they saw and how it left them feeling traumatized. Six people testified in all, including four witnesses who were younger than 18 on the day of Mr. Floyd’s arrest.

Prosecutors walked through the arrest minute by minute with the witnesses. The youngest of them testified off camera, though viewers could hear them in real time. At times, their voices wavered as they recalled the events of May 25, and attorneys gave them time between questions to collect themselves. Here are the highlights of the second day.