It’s been ruled by the coroner in the Michael Jackson case that lethal amounts of propofol killed the pop star, according to the Los Angeles Times.

This overdose led to the Kind of Pop’s cardiac arrest, sparking the investigation over his cause of death. Jackson’s doctor claims that he administered the drug to the singer in order to combat his insomnia.

I’m no legal expert, but I’m guessing that’s not great news for Jackson’s doctor, Dr. Conrad Murray.