Ex-WCW star Daffney's death has been ruled a suicide by officials in Georgia ... TMZ Sports has learned.
According to the death certificate, released Monday, the former wrestler died of a self-inflicted gunshot wound to the chest.
As we previously reported, Daffney -- real name Shannon Spruill -- was found dead on Sept. 2 ... after she had recorded herself on Instagram Live appearing to be suicidal.
In the videos, Daffney could be heard saying, "Do you guys not understand that I am all alone? Do you not understand that?"
She later said, "Remember, my brain goes to Boston.