Dr. Conrad Murray, left, the cardiologist under investigation in the death of pop star Michael Jackson
Photograph by: Pat Sullivan
Credit: AP

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Murray arrived at the clinic and was greeted by a couple patients and his pastor.

Murray didn't speak with reporters before entering the Armstrong Medical Clinic, but a spokeswoman for his attorney says Murray is looking forward to getting back to work.

Murray, a cardiologist, was hired to be Jackson's personal physician during a world tour. He was with Jackson when the 50-year-old singer died June 25.

The doctor has been the focus of a Los Angeles police homicide investigation since telling investigators he administered a powerful operating room anesthetic to Jackson to help him sleep.

Murray has not been charged with a crime.