Dog Health Questions: Who was this woman on Dangerous Women?

I was watching "Dangerous Women" and there was a mother who had 2 daughters and 2 sons. One of the daughters was handicapped and the mother put her on the floor, threw food on the floor, and made her pee on dog training mats. She killed her other daughter, and then was trying to kill her second daughter and made her sons help her? The daughter ended up living. Who was this?

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I have no idea, but she must have been ONE SICK BBBBITCHHHH!!!

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• I think this was on the show Deadly Women on I.D. Discovery channel. Fascinating stuff. She was the one who carved words on the daughter's abdomen? They should all be executed and quickly not hanging around in prison for 10 or 20 years on appeals. They should bring back sentences to life in prison with hard labor.