We've learned L.A. County Assistant Chief Coroner Ed Winter just arrived at the Beverly Hills medical office of Dr. Lawrence Koplin, subpoena in hand. We've learned Winter is on the hunt for Michael Jackson medical files.
We're told Winter is interested in the records of the nurse anesthetist in the office -- David Fournier. We're told Dr. Arnold Klein performed procedures on Jackson in Dr. Koplin's office and Fournier administered anesthesia.
UPDATE: Winter has just left and he confirmed he is "still looking for medical records involving Michael Jackson."