SCOTTSDALE, AZ (3TV/CBS 5) – A grieving dad is stepping up efforts to find the driver in a hit-and-run crash that killed his son from Scottsdale. The pain and sorrow doesn’t go away for the family of David Hadrich. Loved ones gathered at his memorial site along Cave Creek Road Thursday to express their grief and determination to help catch the hit-and-run driver who ended Hadrich’s life. “This is heart-wrenching,” said Tim Hadrich, David’s father. “My heart is shattered in not just a million pieces, but a billion pieces. We need to bring this person to justice.”