The appeal of a former doctor convicted of murder over a patient’s drug overdose now hangs on one mysterious unsigned memorandum that prosecutors have refused to give to defense attorneys.

The Georgia Court of Appeals has ordered that Dr. Noel Chua must be given a hearing on his Open Records Act lawsuit seeking a copy of the document for his appeal. Chua was an internal medicine specialist in St. Marys before he was convicted of felony murder for the drug overdose death of a 19-year-old houseguest to whom the doctor had prescribed pain pills.