Cosco Inc., a subsidiary of Dorel Industries based in Canada in one of the largest manufacturers of child products in the world. Twice in the last ten years, the federal government has caught Cosco covering up injuries and deaths associated with tis products. Dateline NBC has compiled a comprehensive list of serious spinal chord injury and death cases associated with the Grand Explorer child seat and it predecessor, the Explorer. Other companies have discontinued all of their similar models and Cosco is the only company still selling this type of shield booster seat. Dateline talked to state troopers, attorneys, parents of children who died in accidents while riding on the seat, medical examiners, and government sources in this six-month investigation.