The involuntary manslaughter trial of Michael Jackson’s doctor, Conrad Murray, has been delayed because a witness’s family member died. Court proceedings were canceled on Monday, because the father of the prosecution’s last witness Dr. Steven Shafer died, CNN reported . Shafer is an expert in anesthesiology at Columbia University , started testifying on Thursday about the effects of the drug propofol, which was found in the King of Pop’s stomach after his 2009 death. Judge Michael Pastor suspended the trial for another day on Tuesday to allow Shafer more time to grieve for his father, according to CNN . The extra day off also gives the defense more time to review toxicology test results about what was in Jackson’s system when he died. The coroner’s officer concluded that an overdose of propofol killed Jackson and prosecutors accuse Murray of supplying the lethal dose in a cocktail of other sedatives to help the tormented singer sleep. The defense team plans to attack the official autopsy results from the coroner’s office. The trial will resume on Wednesday. WATCH MORE TOP NEWS: View post: Death Delays Michael Jackson Doctor’s Trial