Federal and local authorities searched Applied Pharmacy Services on Tuesday morning. The official said agents uncovered evidence that Dr. Conrad Murray legally purchased the anesthetic propofol there.
The official spoke to The Associated Press on condition of anonymity because the investigation is ongoing.
Jackson's death is being investigated as a manslaughter and propofol, which Jackson took as a sleep aid, is a main focus.
Murray's attorney Edward Chernoff had no immediate comment.
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