You should remember Diane Whipple of San Francisco, who was killed in 2001 by two Presa Canarios. The California Supreme Court has made a ruling that a dog owner who knows the animal is a potential killer and exposes other people to the danger may be guilty of murder for fatal attack. Read about it here.
I would be delighted if they reinstate the murder charge against Marjorie Knoller, and even more delighted by a conviction. I'd like to see the prosecutors extend the charge to her husband.
This is what responsible dog owners have been saying all along...charge the owner. Enforcement is key to preventing dog bites and attacks. If these people had been charged for previous aggressive behaviour by the dogs (30! incidents), Diane Whipple might still be alive.