An expert on the powerful anaesthetic blamed for Michael Jackson's death today told jurors that it is difficult to know the medication's precise effect on the singer because he had been given so much of it for his insomnia in the months before he died.

The lead lawyer for the doctor charged in Michael Jackson’s death challenged a key prosecution expert about his contention that the physician was responsible for the death of the singer.

Michael Jackson was so heavily drugged in the hours before his death that he would have been incapable of self-administering the massive dose of propofol that killed him, a medical expert testified at the trial of Jackson’s doctor.

An expert in the powerful anaesthetic blamed for Michael Jackson’s death has told jurors there is no way the singer could have caused his own death by swallowing the drug.

The trial of the doctor charged over Michael Jackson’s death has resumed after days of delay, with jurors hearing from a leading expert on the powerful anaesthetic propofol that authorities say killed the star.

The trial of Michael Jackson’s doctor resumes today with jurors hearing more about the powerful anaesthetic that killed the King of Pop.

Experts repeatedly told jurors that Michael Jackson’s doctor acted with “gross negligence” throughout his treatment of the pop star as prosecutors neared the end of their involuntary manslaughter case against the physician.