Qaletaqa Walker's Unnamed Father is mentioned by Jeremiah Otto in Children of Wrath
Pre-Apocalypse
Nothing is known about him before the apocalypse
Post-Apocalypse
When Nicholas Clark finds a skull under his house. He questions Jeremiah about it, he revealed shot Walker's father, later buried his father under Russell's (now Nicholas Clark's house). Nick seems little angered but mostly disgusted to Otto for doing that. His brother's remains are left unknown.