While all hunters appreciate you good intentions, I question whether it's worth the risk. Health care is still a lot more expensive than buying meat. Anytime a deer dies and the reason why is not obvious I would be concerned.
While I have never found any factual information of anyone dying from eating venison, I would still be leery of eating the deer you found.
Diseases like CWD, bovine TB, and Hemorrhagic disease.
Check out this link for more information and pictures.
http://mdc.mo.gov/nathis/mammals/deer/disease.htm
Dave