7 year old child sitting behind father when vehicle was hit from behind causing intrusion into the vehicle pushing the rear seat area forward; from the impact, driver's seatback yielded/failed significantly into the child's rear seating position area causing permanent catastrophic brain injuries to the child. Vehicle is currently being stored and preserved for evidence at SAFE, 6775 Hollister Ave., Goleta, CA 93117. Inspections of the vehicle are anticipated in the future.