I've heard some boxers and former boxers say he did and some say he didn't.
Look at 12:46 in this video. Pacquiao and Roach are certain that he knew about the illegal hand wraps.
YouTube - Pacquiao - Margarito HBO 24/7: Episode 1 - (Part 1 of 2)
Look at 12:46 in this video. Pacquiao and Roach are certain that he knew about the illegal hand wraps.
YouTube - Pacquiao - Margarito HBO 24/7: Episode 1 - (Part 1 of 2)