How did Madame Hoo interrupt the trial?

The answer to this question can be found in chapter 26 of The Westing Game. This chapter is a court proceeding with Judge Ford presiding, Turtle Wexler as a lawyer, and Sydelle Pulaski as the court reporter. I would say that Mrs. Hoo interrupts the trial twice in this chapter. The first time is not a big interruption. Mrs. Hoo isn't following the English of the trial all that well, and she gets worried when Turtle repeatedly says the word "who."

Turtle forgot the rules of the court and hurried to her mother. “Who did you see, mom? Who? Who?”
(Terrified by the whos, Madame Hoo slipped away.)

It turns out that Mrs. Hoo is the person that has been stealing everybody's stuff, and she thinks that she is going to get found out and get in big trouble because of the trial. She returns to the trial with the stolen goods (minus Grace's cross) and interrupts the proceedings in order to return the stuff and give a reason. She was going to use the items to help pay for a trip back to China.

“Yes, please.” A trembling Madame Hoo stood before the judge. “For to go to China,” she said timidly, setting a scarftied bundle on the desk. Weeping softly, the thief shuffled back to her seat.