Why did Meursault not look at Marie during the trial?

The following summer, Meursault’s trial begins. Meursault is surprised to find the courtroom packed with people. Even the woman he saw checking off radio programs at Celeste’s is there. The press has given his case a great deal of publicity because the summer is a slow season for news. The judge asks Meursault why he put his mother in a home. Meursault replies that he did not have enough money to care for her. When the judge asks Meursault if the decision tormented him, Meursault explains that both he and his mother became used to their new situations because they did not expect anything from one another.

(sorry if i'm wrong)

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passage?

explanation: