On Tuesday, at the preliminary hearing to determine whether Dr. Conrad Murray will be tried for involuntary manslaughter in connection with the death of Michael Jackson, a coroner’s official testified that the pop icon was basically healthy but that, as his personal physician, Murray provided him with “substandard” care. According to the Associated Press, Dr. Christopher Rogers, a forensic pathologist, told the court that Murray was wrongly using the powerful anesthetic propofol to treat the singer’s chronic insomnia and that he should have more closely monitored Jackson while he was under sedation. Rogers said he didn’t believe the defense’s suggestion that Jackson may have injected himself with propofol, though he told the court that it’s possible Jackson may have swallowed some of the drug, based on the amount found in his stomach after his death. On Monday, a detective who questioned Murray in the wake of Jackson’s death said the doctor told him that he noticed Jackson wasn’t breathing shortly after 11 a.m. on the morning of his death. According to phone records, Murray didn’t call paramedics until 12:21 p.m., a delay that prosecutors contend demonstrates negligence on Murray’s part.