The Clarendon police are investigating the killing of a 64-year-old woman whose partially nude body, bearing stab wounds, was found at her home in the Union district near Frankfield.The deceased has been identified as Hyacinth Rose Johnson, a domestic helper.The police report that about 7:00 a.m. on Wednesday, residents stumbled upon the body behind Johnson's house.The police were summoned, and upon arrival, officers observed the body lying face down with stab wounds to the chest.