Larry King Live aired from 1985 to 2010. Sharon Stone is a well-known actress and has appeared on Larry King Live multiple times, but not in the same episode as the other two individuals.
Sandra Cantu was a young girl who was murdered in 2009. Melissa Huckaby was convicted of her murder.
It's possible you are thinking of a different show or misremembering the details. Can you please provide more information or context about what you are looking for?