WHITE PLAINS — An attorney for a woman accused of killing her son with salt says the boy's high sodium level was caused by his medical treatment.Defense lawyer Stephen Riebling said in his summation Thursday that 5-year-old Garnett-Paul Spears was allowed to become dehydrated — then was given a salty IV fluid.Lacey Spears of Scottsville, Kentucky, is being tried in New York on murder and [...]