Micheal Jackson's death certificate has been changed to recognise it was homicide.

The document was amended and specified that his death was caused by "injection by another" after investigators concluded that a powerful concoction of prescription drugs killed the pop star.

The coroner's further verdict, agreeing with investigators, also increases the chances of criminal charges being brought against Jackson's doctors.

Police have interviewed his personal physician Dr Conrad Murray but he has not been named as a suspect and has denied any wrongdoing.

Jackson is expected to be buried in a private sunset ceremony in the Forest Lawn Memorial Park in California but only close family and friends will attend.