Anesthesiology expert witness Dr. Steven Shafer testified for the prosecution in the Dr. Conrad Murray trial. Shafer, who has special expertise in postoperative pain, testified there was an improper “employer-employee” relationship between the singer and the defendant. He also testified that when the drug propofol is administered outside of a hospital, it is critical to have the appropriate equipment. Outside of a hospital, if “you have an error, you have a mortality.”