Propofol is a powerful anaesthetic usually given to surgery patients to help them sleep, and Michael's personal physician Dr. Conrad Murray has pleaded not guilty to his involuntary manslaughter.

Murray had admitted giving Jackson a small amount of propofol, a powerful surgical anaesthetic intended only for use in hospitals, but claimed it should not have been enough to kill him.

Murray had admitted giving Jackson a small amount of propofol, a powerful surgical anaesthetic intended only for use in hospitals, but claimed it should not have been enough to kill him .