The Pendle Witch Child(2011)

The extraordinary story of the most disturbing witch trial in British history and the key role played in it by one nine-year-old girl. Jennet Device, a beggar-girl from Pendle in Lancashire, was the star witness in the trial in 1612 of her own mother, her brother, her sister and many of her neighbours and, thanks to her chilling testimony, they were all hanged.

Official site