He did not interrogate them.

He had thought about it on the walk from the living room, and had understood, with the small part of his brain that was still functioning, that if he came in and started asking questions in the voice he used in depositions, he would learn nothing and would frighten them further.

So he sat down on a stool, which put him below their eye level, and he said:

“I’d like to know what it’s been like.