The Associated Press is reporting that Michael Jackson’s doctor administered a powerful anesthetic to help him sleep, and law enforcement sources are saying that drug may have killed Jackson. Los Angeles Police told the AP that Dr. Conrad Murray administered the intravenous drug sometime after midnight June 25. The report states that Jackson regularaly recieved the drug, wherein a doctor would administer it when Jackson went to sleep, then stop the IV drip in order to wake him.

While Murray, who had tried to revive Jackson, has been the subject of a manslaughter investigation, Police say he is not a suspect, according to the AP. Read the full report here.