Police are searching for a doctor who they hope will help in the investigation of Michael Jackson's death.

Los Angeles police spokeswoman Karen Rayner says that police towed from Jackson's house a BMW owned by one of the superstar's doctors.

Said Rayner: "We have not been able to interview the doctor yet. His car was impounded because it may contain medications or other evidence that may assist the coroner in determining the cause of death."

TMZ.com reported that the doctor lived at the home. Rayner said she could not confirm that and did not know the doctor's identity.

She stressed that the doctor was not under criminal investigation but coroner's investigators wanted to contact him.