File - Dr. Arnold Klein arrives at Elizabeth Taylor's Diamond Jubilee Birthday in this February 27, 2007 file photo taken in Henderson, Nev. Klein, Jackson's dermatologist, who said he last saw Jackson less than a week before he died, told CNN's Larry King that the singer was in 'very good physical condition,' in 'a very good mood,' and 'was very happy.' (AP Photo) A county coroner's official visited the office of Michael Jackson's dermatologist on Tuesday to follow up on a subpoena seeking additional medical records. Assistant Chief Coroner Ed Winter said outside the Beverly Hills office of Arnold Klein that the doctor had been cooperating in the investigation. Craig Harvey, the coroner's chief of operations, said Klein had yet to provide some records, but his lawyers had said Klein would comply. Harvey would not specify what records were being sought. Investigators have focused on the role drugs may have played in the death of Jackson. In recent TV interviews, Klein said he had sedated Jackson for past medical procedures. He denied ever giving the pop star an unnecessary dose of drugs. Written by sina.com