Police knock on doctor's door over Jackson's death

LOS ANGELES: Federal agents and detectives swooped on the offices of Michael Jackson's doctor on Wednesday, as lawyers for the physician revealed police are treating the star's death as possible manslaughter.

A spokeswoman for the Drug Enforcement Administration (DEA) confirmed that a search with the Los Angeles police took place at the offices of the Armstrong medical clinic in Houston, Texas, where Dr Conrad Murray practices.

Murray has emerged as the central figure in the mystery surrounding Jackson's death in Los Angeles on June 25 and was the last person to have seen the pop star alive.