U.S. authorities searched the Las Vegas home and medical office of Michael Jackson's personal doctor Tuesday, continuing their manslaughter investigation into the pop star's death.
Drug Enforcement Administration agents entered the sprawling home of Dr. Conrad Murray as well as his office, Global Cardiovascular Associates.
Murray began working as Jackson's personal physician in May and was to have continued with the singer during a concert series in London, England. He has said he found Jackson unconscious on June 25 and tried to resuscitate him.
Police have reiterated that the physician is co-operating with the investigation.
Murray is also licensed in California and Texas. DEA agents and police raided Murray's Houston facilities last week after obtaining a search warrant for what court documents described as a manslaughter investigation.
Estate issues in court
Lawyers for Michael Jackson's mother have gone to court to demand more information about the late singer's estate.
Katherine Jackson's legal team asked a judge on Tuesday for authority to subpoena attorney John Branca and former music executive John McClain, who are executors for the estate.
Jackson's mother wants both business and legal information, the claim said.
A Los Angeles judge said he would rule Monday on the issue. On the same day, he will consider whether the administrators will continue in that role and whether an allowance should be granted for Jackson's three children.
Murray "didn't prescribe or administer anything that should have killed Michael Jackson," said his lawyer, Edward Chernoff. "We will not be commenting on rumours, innuendo or unnamed sources."
Still awaiting toxicology results
Toxicology reports are pending, but a law enforcement official revealed to The Associated Press on Monday that investigators have theorized that the 50-year-old entertainer's heart stopped due to the use of the anesthetic propofol, also known under the brand name Diprivan.
The official, who spoke on condition of anonymity, said investigators believe Jackson had been using the powerful drug to induce sleep.
Propofol, which was among the drugs police found when they searched the home Jackson had been renting, can depress breathing and lower heart rates and blood pressure. It is typically administered in hospitals by trained professionals.