Carl Knighton (died 2012) was a retired school teacher. He was also the father of Jerry Knighton and the father-in-law of Sheila Knighton.
In 2003, Carl worked on a construction site with a friend, Brad. Sometime before or after that, he retired from teaching.
In 2012, Carl contracted the Dorsavirus from his daughter-in-law, Sheila, and died from it.
- ↑ 1.0 1.1 "Patient Zero"