A five-year-old Gerber boy is dead following a three vehicle crash that shut down a stretch of Highway 99. It happened Wednesday afternoon in Los Molinos. The CHP says 5-year-old Gunner Langenderfer died and his mother Katie Ramsey suffered major injuries when her car was rear-ended and pushed into on-coming traffic where it was hit by a semi. The CHP says the driver behind Ramsey didn't see her stop to make a turn. Ramsey's car caught fire and the big-rig jack-knifed, causing the stretch of road to close.