ATLANTA -- Lynn Turner died of a toxic overdose of blood pressure medication, the Georgia Bureau of Investigation announced Wednesday.
Turner, 42, was found dead in her cell at Metro State Prison August 30 of an apparent suicide. An autopsy by the state's Chief Medical Examiner indicated Turner took a toxic amount of her prescribed blood pressure medication, propranolol.
The medical examiner's office said there was no further evidence of injury or foul play.
Turner was convicted in 2007 of killing her husband and boyfriend with antifreeze. The trial found that Turner murdered her husband, Cobb County police officer Maurice Turner in 1995, and in 2001, killed her boyfriend, Forsyth County firefighter Randy Thompson -- both by poisoning with antifreeze.
She was serving a life sentence for Thompson's murder.