Grand jury decides not to charge anyone , prosecutor says . But families on a parade float are on railroad and owner of the parade float , a law firm says . Two veterans were killed and more than a dozen people were injured when train hit float . An NTSB board member said the south traffic light at the grade crossing turned green 21 seconds before the train 's arrival at the crossing , as designed , to allow traffic time to clear the crossing . Accident happened during ` ` Day for Heroes '' parade to honor U.S. veterans .
Grand jury decides not to charge anyone , prosecutor says . But families on a parade float are on railroad and owner of the parade float , a law firm says . Two veterans were killed and more than a dozen people were injured when train hit float . Accident happened during ` ` Day for Heroes '' parade to honor U.S. veterans .