The character of Charles Hedgehog was introduced as Antoine's father in the Archie Comics continuity. He was a prominent figure in the early issues, but his role gradually diminished. While he was never killed off, he was later retconned (changed in continuity) to be Antoine's uncle instead of his father in later issues.
It's possible that you may be thinking of a different character or a different comic series, as the information you're asking for is not accurate to the official Sonic the Hedgehog comics.