The lowest point came not long after Katrina, in late 2005, when Christian was near death in a Memphis hospital.
"He was massively infected," Gene Billingsley said. "All his organs were shutting down."
"The sicker he got, the less he wanted to fight. He was very discouraged, I guess," Aida Billingsley recalled. "It just got to the point where he wasn't interested in doing what he needed to do."