Complex sentence: Margarito was in an incident in which his corner was caught tampering with his hand wraps prior to his bout with Shane Mosley, the hand wraps were found by the CSAC to contain sulfur and calcium which, when combined with oxygen, forms Plaster of Paris.
Split into simpler sentences: Margarito was in an incident in which his corner was caught tampering with his hand wraps prior to his bout with Shane Mosley. The hand wraps were found by the CSAC to contain sulfur and calcium which, when combined with oxygen, forms Plaster of Paris.