Rachael Hilyard, of Wichita, cut off the head of 63-year-old Micki Davis with two steak knives on April 9, 2017. Hilyard, 38, attacked Davis without provocation,...Prosecutors said Davis' grandson told police Hilyard jumped on the elder woman and beat her with no warning...Hilyard used a second knife after the blade of the first one broke. Davis was found in the garage and her severed head in the kitchen sink...