Authorities searched the Las Vegas home and medical office of Michael Jackson's personal physician Tuesday as part of their investigation into the pop legend's death.The Associated Press . A similar team searched Global Cardiovascular Associates Inc., Murray's medical offices.Michael Flanagan, assistant special agent in charge of the Las Vegas DEA office, told the AP he couldn't comment on what documents the agents were seeking. Flanagan told the Las Vegas Sun that the warrant was sealed but pertains to Jackson's death.raided Murray's clinic and storage unit in Houston last week. His attorneys said they were looking for evidence in a manslaughter investigation. Police said Murray is cooperating with the investigation, and he has not been named a suspect.Murray's attorney, Edward Chernoff, didn't immediately respond to TVGuide.com's calls about the Las Vegas search.