Dame Elizabeth Taylor was reportedly going to be a defence witness in the manslaughter trial of Michael Jackson's physician.

The 'Cat on a Hot Tin Roof' actress - who died in March aged 79 - was expected to claim the 'Beat It' singer, who passed away in June 2009 from an overdose of the Propofol, drugged his doctors in order for them to give him more painkillers.

Dr. Conrad Murray - who is due to stand trial for the involuntary manslaughter of the star after being accused of administering the lethal dose of the anaesthetic that killed him - was thought to be hoping the actress' evidence would clear him of charges and prove Michael knew how to hook himself up to an intravenous drip.

A source close to Murray's lawyers told the Daily Mirror newspaper: "Her testimony was dynamite for the defence. An insane story we uncovered was Michael considered himself a self-taught doctor and slipped tablets into drinks to drug his physicians."

The trial is scheduled to begin on September 26.

Earlier this month, Michael's former defence lawyer Tom Mesereau said he thinks Murray "should be" prosecuted over the singer's death if the involuntary manslaughter accusation - which he denies - is true, so his family can get on with their lives.

He exclusively told BANG Showbiz: "I have mixed feelings about the trial. On the one hand I'd like to see the Jackson family get Justice, I think what the doctor allegedly did was outrageous and based on everything I've heard he acted very recklessly, very foolishly and should have stood up to whoever he had to stand up to and say, 'This is Dangerous, this doesn't belong in the home, we don't have proper equipment and we don't have proper help.' That's the way he should have behaved as a medical professional...

"I think he should be prosecuted to help vindicate the family and also to send a message that physicians should not behave this way."