Rick, concerned about Carl's moral standing after the events on the farm, takes him aside and tries to set him on the right path. Lori becomes concerned about Rick's dark influence, especially after the events of the previous episode (in which Rick told a wounded Andrea to stay on cooking and laundry duty while she healed, an order that horrified Lori). Lori, in an act of defiance to Rick, tells Carl to go play outside in the woods. When Double-Zombie Shane attacks, Carl is forced to put him down again. Lori, wondering where Carl went, runs up to find Rick consoling a weeping Carl. Lori and the group decide they can no longer trust Rick after this.
-Episode synopsis S3-04, "No Child Left Behind"