I agree 100%. People who use the criminal justice system as a tool to manipulate other people really piss me off.
As for this DA, check out this quote from the story: She defended her decision to arrest the victim, saying “I would rather have to explain why she was arrested than why she was dead.”
She's not all that worried about the woman, she's more afraid of having to explain herself later if something bad happens. This is a terrible character flaw!
This DA rightly observed that it's a lose-lose situation - SOMEbody (either the victims-rights group or the civil liberties group) is going to be really mad at her no matter what she does, and campaign against her at the next election. I can understand how that bothers her - it's probably not her primary motivation, though. Most DAs really care about the victims of crime, I've seen some of them get almost physically ill when they lose a victim or a witness to a repeat criminal.
Those particular words are just what the author of this article seized on. Given the title of the blog and some of the language in the article, I'm pretty sure he set out to make her look bad. He's certainly succeeded, but I think we should at least reserve judgment.