[cnn-photo-caption image="http://i2.cdn.turner.com/cnn/2009/SHOWBIZ/Music/07/28/michael.jackson/art.conrad.murray.house.cnn.jpg" caption="Investigators arrive at the Las Vegas, Nevada, home of Michael Jackson's personal physician."]
Investigators began searching the Las Vegas home and office of Michael Jackson's personal physician, Dr. Conrad Murray, on Tuesday morning, a Drug Enforcement Administration spokesman said.
Los Angeles police and DEA agents, carrying search warrants, were "looking for a lot of things," said Assistant Special Agent in Charge Mike Flanagan.
Aerial cameras showed Las Vegas police cars were parked outside Murray's home and the residential street was closed. A CNN producer saw a police detective and a DEA agent enter Murray's medical office.
The searches come a day after a source with knowledge of the investigation confirmed to CNN that Murray administered a powerful drug that authorities believe killed the singer.
Flanagan said that while he could not disclose details of the search warrants, because a judge had ordered them sealed, he confirmed they were looking for documents and computer records.
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