Cops look for Jackson's doctor

LOS ANGELES, California (CNN) - Police are looking for Michael Jackon's personal physician but have been unable to contact him, they said Friday.

The doctor's car was towed from Jackson's home Thursday and impounded, authorities said.

The car may contain "medications pertinent to the investigation" into Jackson's death, said Detective Agustin Villanueva of Los Angeles Police Department said.

Police did not release the doctors name.