As the investigation into the events surrounding Michael Jackson‘s death continues, officials are turning to yet another doctor who may have prescribed drugs for the late King of Pop: TMZ reports that law enforcement sources have subpoenaed Dr. Allan Metzger’s files. The doc was also reprimanded for prescribing medication to Janet Jackson using aliases.

The doctor has been ordered by the coroner’s office to produce all medical files relating to Michael. He’s already been brought before the Medical Board of California for allegedly writing fraudulent prescriptions for Janet “using a false/fictitious name.”

TMZ also reports that Dr. Metzger’s files for MJ were labeled “Omar Arnold/Michael Jackson.” However, it’s not illegal to use another name if the patient’s real name is also included on the file.

“I have not treated him [Jackson] for ages,” Dr. Metzger told TMZ on July 5, and denied ever discussing Propofol with Michael.

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