I don't know which dog or dogs did her in but she owned two Presa Canario dogs. They can get up to 130 pounds and are mean as hell. Worse than pitbulls IMO. Everyone remembers the case in San Francisco with the two dogs that killed a lady in front of her own apt building. They were Presa Canario dogs.
Like Timothy Treadwell and bears and this woman and dogs many people have a fervent unshakable belief in the palpably untrue. My personal belief is that they were unduly influenced by the anthropomorphic animal portrayal in stuff like "Bambi" and "The Bear" and don't hav a clue as to the real nature of animals. Well sometimes when you're stupid and you cling to stupid beliefs you end up paying the price.
On a related matter a family member is a surgeon, and one of the things that said family member does on a regular basis is repair the faces of those who are attacked by their own dogs. One in particular was reattaching a nose that was bitten off by a "rescue dog". Moral of the story if you're going to have a dog, raise it from a puppy, don't pick up someone else's problems.