Los Angeles detectives, federal drug agents and Houston police raided the offices of Dr. Conrad Murray, the physician who was with Michael Jackson when the entertainer was stricken at home last month.
Acting on a search warrant, a caravan of 15 cars descended on the clinic at about 10:20 a.m. Wednesday, with officers in Drug Enforcement Administration windbreakers seen entering the building.
Agents are focusing the investigation on the drug Propofol, the powerful anesthesia that Jackson may have taken before his death, a law enforcement source tells PEOPLE.
“It is Conrad Murray they’re looking at,” the source says. “They are looking for Propofol, along with anything else they find. But Propofol is the big one.”
Numerous reports suggest that Jackson likely died after being administered the powerful sedative Propofol, or Diprivan, an anesthetic that’s only supposed to be used in hospitals. As Rock Daily reported, Jackson’s nurse/nutritionist said Jackson desperately sought Diprivan in the weeks before his death. An overdose of the sedative could cause someone to stop breathing, which leads to a buildup of carbon dioxide buildup in the body that could result in sudden cardiac arrest, which is what ultimately caused Michael Jackson’s death.