The accused threw a heavy trailer hitch from a moving vehicle, striking the victim in the abdomen and rupturing her small bowel.
The victim, who suffered from advanced liver disease, underwent surgery but died five months later from complications including peritonitis and pneumonia.
The accused pleaded guilty to aggravated assault but contested the manslaughter charge, arguing his actions did not cause her death or that delayed medical treatment broke the chain of causation.
The court found that the blunt force trauma was a significant contributing cause that accelerated her death, and that no intervening act severed legal causation.
The accused was found guilty of manslaughter.