The synthetic THC pill Marinol was cited by the FDA as being responsible for 4 of the 11,687 deaths from 17 different FDA approved drugs between January 1, 1997 to June 30, 2005.

Non-Toxic in it's natural form. To kill a rat, the lethal dose is 42 mg per Kg of body weight of pure THC.

Assuming she weighed 50 Kg, and that is fairly lighter than average, she would need 2.1 Kilograms of pure THC in her system to kill her if she was a rat. She would die of smoke inhalation before she could get that into her system.

But easy solution, upload the coroners report to a image viewing site in at least 600 dpi, and post the link. Then post a link to her obituary, which would have to be in the paper, so it would be public record.