Dr. Conrad Murray's Lawyers Want Key Propofol Evidence Retested

November 7: Conrad Murray remains expressionless next to his attorney J. Michael Flanagan (L) after the jury returned with a guilty verdict in his involuntary manslaughter trial in Los Angeles. (Reuters)

Lawyers for the doctor convicted of causing Michael Jackson's death are returning to court to seek testing of a vial of the powerful anesthetic that killed the singer.

Attorneys for Dr. Conrad Murray are expected to ask a judge Monday to release to an independent lab the vial of propofol that authorities contend was used on the morning of Jackson's death.

Attorney J. Michael Flanagan wrote in a court filing that the testing is necessary to analyze the prosecution theory that Murray placed Jackson on an IV drip of propofol and the painkiller lidocaine then left the room.

Prosecutors and Flanagan are expected to argue about the request during a hearing at 11 a.m. in Los Angeles.

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