She died in "tried by ordeal" with the dunking stool, aquitted of heresy but died.
If an accused person died during their punishment, they were then said to have been found innocent, believing that God had intervened to relieve their suffering and the family was then given money for a Christian burial. If the accused survived the trial by ordeal, it was believed that they had been helped by the Devil and they were subsequently put to death, often by burning at the stake. Since Kathryn died during the ordeal, she was listed as "Kathryn Garner, Welsh woman, found innocent of Witchcraft in Trial by Water, 2 pounds for burial in Christian ground." Shropshire, England, 1636.