It’s been a week and few days after Carl’s death ; when he shot himself infront of Rick Grimes and Michonne Grimes (his step-mom since his actual one, Lori is dead). But he isn’t dead anymore, not fully atleast.. He’s laying in the forest after being dropped out there and his eye strikes open - turning a yellow color with his natural blue, it being dark the eye faintly glows. This is the first ‘half-walker’ to exist, full walkers can trigger him to act up, complete changes cut out his voice.