She said she rushed home to be by her dad's side for his last months.
When she called, she was asked 'Are you driving?.
Walker was raised a Mormon in a working class California family, but his good looks - he was once described as a 'young Steve McQueen' - meant he was never lacking female attention.
Walker had promised to be with Atwell at her father's memorial service December 8.
Share 'In my gut, I knew something was wrong,' the 28-year-old told the.
He also strayed from the family values his parents instilled in him and when he was 18 faced a felony charge though he has never revealed what it was.
Her mother is with her and she is comforting her.
Atwell said 'I'm sure a bit of speed was involved' Walker had been at a charity event on behalf of his organization Reach Out Worldwide, helping victims of Typhoon Haiyan.