Its more than idiotic owners. This case was BIZARRE in the extreme . . . they weren't just idiotic, they were freaking strange, and that's being nice. Read about how they GOT those dogs . . .which may not even have been purebred Presas . . . . its really, really . . . UGH. I'm not sure, technically, if this was murder . . . by the technical definition of it. BUt you can probably wedge it in under the "malignant and depraved heart" theory, and if I looked up the trial records, that's probably what they did: the idea there is that you didn't preplan it, and you didn't INTEND to kill anyone per se, but your behavior was so entirely, and utterly, and completely, disgarding of human life and safety, so likely to kill, so deeply irresponsible and, moreover, "malicious" or "heartless" that if a death results it is tatamount to murder. The theory is often misused . . . but I think this is the sort of situation it was made for.
There is no doubt however that the behavior of this woman was appalling, at least somewhat malicious, and utterly lacking in remorse. amd that she had no regard for the safety of her neighbor, or anyone else, despite plenty of warnings. Check out her explainations as to WHY the attack happened too . . . I've been following this one for years.