. >> david walgrin laid out the prosecuti prosecution's case. >> michael jackson trusted his life tolls of conrad murray. that misplaced trust in the hands of conrad murray cost michael jackson his life. >> to help prove the ca . >> reporter: to help prove the case, prosecutors present a very different image of the pop legend. from a vibrant singer, dancer and entertainer on stage, to a completely different person behind the scenes. >> to michael jackson. >> reporter: then, midway through opening arguments, a stunning moment. the voice of michael jackson as he'd never been heard br. >> when people leave my show, i want them to say he's the greatest entertainer of the world. >> reporter: jackson sounded fragile. impaired. incapable. and that's just what kenny ortega feared. ortega was dreirecting the most anticipated show in decades, with a star he feared wasn't up to it. but murray insisted he was in charge of jackson's health. >> he said i should stop trying to be an amateur doctor and psychologist and be the director and allow michael's health to him. >> those were the words of con