Nick Hogan's fresh DUI arrest is opening some old wounds for the family of the man who was severely injured in the guy's 2007 crash -- and they think Nick hasn't learned his lesson.
TMZ talked to John Graziano's mother, Debra ... who says she isn't surprised over Nick's latest bust -- telling us he appears to have been as careless now as he was almost 20 years ago when he got into another car wreck as a teen -- which changed her son's life forever.