Michael Jackson's personal doctor is the target of a manslaughter investigation into the singer's death.
A search warrant filed in a Houston court Thursday allowed authorities to seek evidence of whether Dr. Conrad Murray committed manslaughter.
Murray is the cardiologist who was with Jackson when he died June 25.
Los Angeles police and federal drug agents used the warrant to seize items Wednesday from Murray's clinic in Houston.
The doctor's lawyer previously indicated authorities were seeking a manslaughter probe, but the warrant marks an official confirmation of the investigation.
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