According to the entries in Woodward's records of Salem Witchcraft cases, the evidence from the testimonies of John and Lydia Porter, Joseph Fowler, and Thomas and Mary Jacobs linked Sarah Bibber to witchcraft as follows: Sarah was a woman of unruly turbulent spirit, who would fall into unruly behavior. Bibber would be cross with her husband and would call him names when she was angry, she was double tongued, and would have strange fits when she was cross. Bibber was also a woman who was very idle in her calling. Bibber was also very much given to tatling & tale Baring hence she made mischief among her neighbor's, and very much given to speak bad words. Lastly, she would call her husband bad names and was a woman of a very turbulent unruly spirit
The other testimonies stated that Bibber would often speak against her husband when things fell apart. She even witched often to the level that her child fell into the river and she never pulled the child herself. Again, she was a woman of unruly spirit. Lastly, Bibber pulled torn pins out of her close and held them between torn fingers and clasped her hands around her knees and then cried out.