Eating roadkill isn’t much different from eating wild game you hunted — except with roadkill, it was someone else and their car that killed it accidentally, rather you and a gun intentionally.
No offense, but you're simply ignorant on this topic.
https://scispace.com/pdf/a-guide-to-time-of-death-in-selecte...
This is just one of literally thousands of resources answering this exact question. There are other resources to help evaluate other potential consumption risks. There's no need to pretend that the only animals people can eat are the ones they witnessed being killed; people do otherwise, and have for millennia.