Law enforcement officials with the Drug Enforcement Agency raided the Las Vegas home of Michael Jackson’s personal physican on Tuesday, The Associated Press has learned.

Jose Martinez, of the Los Angeles DEA, has revealed that the Los Angeles Police Department, the DEA, Las Vegas Police, Nevada Department of Public Safety, and Henderson Police are assisting in serving search warrants to the Las Vegas house and office of Dr. Conrad Murray.

The doctor — who was with the King of Pop when he died on June 25 — has become the subject of a manslaughter investigation after he allegedly gave Jackson the anesthetic Propofol on the night before his death.