Parents of Harry Dunn, British teen killed in crash, reveal what they want to ask U.S. woman involved in his death

Almost three years after 19-year-old Harry Dunn was fatally struck by a vehicle, his parents are in the United States fighting for justice. The British teen's father wants answers from Anne Sacoolas in particular, the American woman involved in his death.

"I just want her to own it — her accountability — for what she has done to us as a family and to my son. And I need to ask her why she left, why did she think it was okay to leave my son there and — and just leave the country. It still hurts after two years not knowing," Tim Dunn said in an exclusive interview on "CBS This Morning" Friday.  "I feel like my son's life was just — I don't want to be horrible, but like it was — meant nothing to her," he said.