Federal agents descend on Michael Jackson's doctor

LAS VEGAS — Federal authorities searched the Las Vegas home and medical office of Michael Jackson's personal doctor Tuesday, seeking documents as part of a manslaughter investigation into the singer's death.

Several Drug Enforcement Administration agents entered Dr. Conrad Murray's sprawling home in a gated community while others searched Murray's medical offices in Las Vegas, Global Cardiovascular Associates.

"We are looking for documents" related to the death of Michael Jackson, said Michael Flanagan, assistant special agent in charge of the Drug Enforcement Administration office in Las Vegas. He said federal agents and Los Angles police served search warrants at Murray's house and office.

Flanagan said the warrants were sealed and he was unable to say what documents the agents were seeking.

Authorities had no arrest warrant for Murray, who was at home when the investigators arrived, they said.

A lawyer who has represented Murray in financial cases in Las Vegas, Puoy Premsrirut, did not immediately respond to a message left at her office seeking comment.

Flanagan said staff members at Murray's medical office cooperated with investigators.

Las Vegas police were assisting in the search, said Capt. Brett Zimmerman of the department's vice and narcotics bureau.

Murray was Michael Jackson's personal physician and was with Jackson when he died. Murray, who is based in Las Vegas and is licensed in California, Nevada and Texas, had his Houston office and a storage unit searched last week by DEA agents. Court records show the agents were seeking evidence of whether the doctor committed manslaughter.

Police say Murray is cooperating and have not labeled him a suspect.

Toxicology reports are still pending, but investigators are working under the theory that the anesthetic propofol caused Jackson's heart to stop, a law enforcement official told The Associated Press on Monday. Jackson is believed to have been using the powerful drug for about two years and investigators are trying to determine how many other doctors administered it, according to the official who spoke on condition of anonymity because the investigation is ongoing.

The official said Jackson regularly received propofol and relied on it like an alarm clock. A doctor would administer it when Jackson went to sleep, then stop the IV drip when the singer wanted to wake up.

The day Jackson died, Murray gave him the drug through an IV sometime after midnight, the official said.