According to Sheldon, Carl was killed by a badger and the last words he ever spoke to Sheldon and his family were "I think that there is a badger in our chimney. Hand me that flashlight."
- Father: Pop-pop
- Mother: Meemaw
- Sister: Mary Cooper
- Brother: Edward
- Brother-in-law: George Cooper Sr.
- Nephews: Sheldon Cooper, George Cooper Jr.
- Niece: Missy Cooper