mikel he dunn fired round after round after their 17-year-old son. the first bullet went through his liver, lung and aorta. and yet dunn didn't stop there. firing nine more shots. the jury couldn't decide if it was murder or self defense. and now his parents have to endure another trial. they spoke to robin roberts on abc's "good morning america" about what justice means for their child. >> we have heard you again and again. you want joust justice phenomenon for your son. >> it will be ultimately when we change the laws. because that will be not just justice for jordan and justice for travon and the children at sandy hook and aurora and virginia tech and the navy yard. it will be justice for everyone that has suffered because of these laws. and will continue to suffer. so once the laws are changed, that's the ultimate justice. for all. >> and for me, i'm in constant contact with tracy martin, travon's father and i text sabrina all of the time and i want to let them know every time i get justice for jordan, it's going to be justice for travon and us.