Son Of Michael Jackson Prohibited To Testify The case of Michael Jackson’s death with the defendant his personal physician, Conrad Murray. A number of witnesses and evidence has been presented in the trial. And reportedly, the witness who will re-presented in the trial is the first son of Michael, Prince. The news had been widely heard. However, recent news revealed that Michael’s son will not testify at trial. As quoted from Hollyscoop, Michael’s mother, Katherine Jackson decided not to bring his grandson as a witness at the trial. In fact, he would not let prosecutors bring his grandson to court.