My son was considered at fault on a pedestrian car accident, what do i do?

My son is 14 years old running with his cross country group and while trying to catch up he didn't notice if the light was green or red and continued to run in the cross walk when almost across saw a car and tryed to get out the way but still was struck by the car. I spoke to my insurance and was clear but said to contact the other car's insurance for bodily injury and now the drivers insurance wants a statement from my som even tho his statement is already on the police report.