A few foolish posts in this thread. Yes, black hair appointments can take a huge amount of time - Token was not exaggerating about that when he said it can take 8-10 hours, especially if she got braids. If you don't know or don't believe that, do a simple google search.
In addition to that, another news article mentioned that the stylist she was coming home from was located near 1960:
http://www.chron.com/news/houston-texas/houston/article/Gunman-kills-girl-8-after-car-accident-10959952.phpIf the mother really was engaged in illegal/nefarious conduct that cost the child her life, then I'm sure that will eventually come out - and if so the mother should face consequences. But based on what is reported so far, this was an act of violence against innocent civilians.