First clue at 1:30, "and then there was one that was straight out and out child pornography."
https://www.youtube.com/watch?v=1VWyJGmyZuw&t=1m30s
Second clue at 53:50: "and, in one case, nude at the top."
https://www.youtube.com/watch?v=1VWyJGmyZuw&t=53m50s
Links to exact times.