I think it's inconsistant, I think it wasn't well thought through, and I think it's cliche.
She was the victim of a crime? Been done. It also makes no sense for her to be experiencing these flashbacks and emotions so long AFTER the crime. If it were her sisters or friends, and she was young, it makes no sense that 15 or so years later she's freaking out. It makes no sense paired with episodes we've seen before, including "Manhattan Manhunt." Not only that, but if she was the victim of such a horribly bloody case, I have a hard time believing that A., a similar case has never sprung up before this point to touch off her emotions, B., she'd want a career where she'd be seeing those kinds of awful murders fairly regularly, and C., that Mac or any other seasoned leader of a CSI team would want someone with that kind of background on their team, and not because she did something wrong, but because of situations JUST LIKE THIS.
I know we haven't seen the end of this storyline, but frankly, I was disappointed.