Lance Cooper, the Marietta lawyer whose suit on behalf of a couple claiming a General Motors ignition defect caused the death of their daughter, issued a statement Thursday about GM’s internal investigation. Cooper represents the parents of Brooke Melton, who want a judge to rescind their 2013 settlement with GM on claims that the company hid evidence from them before the suit over Brooke’s death in a Chevrolet Cobalt was resolved.

According to the website for his cocounsel, Jere Beasley of Montgomery, Ala., Cooper said: “Although Mary Barra’s remarks provide additional information about the investigation, there is still much work to be done. Ms. Barra denies that there is any evidence that GM employees made a trade-off between safety and cost. Documents produced in the Melton case, as well as the testimony of the GM employees clearly show that GM chose not to fix the safety defects in these vehicles for cost reasons. This is why it is critical that the civil cases move forward so that the American public may learn the whole truth, not just the truth GM chooses to disclose.”