involuntary manslaughter for injecting the insomniac pop star with a lethal dose of the anesthetic propofol. what do you think as his mother caused his death? i don t know. all i know is they used propofol and they shouldn t have used it. reporter: the plaintiffs, jackson s mother katherine and his three kids, blame aeg. its lawyer says there was never a signed contract and murray, who was never paid anything, served only at the pleasure of michael jackson. if you look at it accompliceitly, he was chosen by michael jackson to be there at michael jackson s behalf. michael jackson was the only person who could get rid of him at will. reporter: possibly testifying, jackson s 16-year-old son, prince michael, and 14-year-old daughter paris. also on the list but not expected to testify, the artist prince, who had his own history with aeg. musician quincy jones could take the stand to testify how much