Dr. Conrad Murray gave the late Michael Jackson the powerful drug that authorities believe killed him, claims a new report.

Citing an unnamed official, The Associated Press reports that Dr. Murray gave Jackson the anesthetic propofol on the night before his death.

Dr. Murray, who was with Jackson on the day he died last month, is at the center of a manslaughter investigation, according to court documents.

A lawyer for Dr. Murray tells The AP that he did not prescribe or administer anything that should have killed the King of Pop.