People laughing in a death penalty trial?

“Maybe he didn’t hear me so I repeated the question again. “Sir, what color was the blue bag?”
More laughter. What is going on? Why are people laughing in a death penalty trial? Before I could ask the dumbest question in the history of the English-speaking world a third time, the judge took mercy and said, “Mr. District Attorney, I think the jury knows what color the blue bag was now! You can move on.”

Excerpt From: Trey Gowdy. “Doesn’t Hurt to Ask.”