Matthew Hopkins was a former Essex lawyer who called himself ‘witchfinder general’. In 1645 he was employed by a JP in Essex and East Anglia to uncover witchery.
Hopkins used a range of interrogation methods to get the accused to confess, including starving them and depriving them of sleep.
The accused would by physically examined to look for a ‘teat’ with which they would feed their ‘familiar’ – eg a mole or birthmark.
When the victims were forced into a confession, it would have to include the names of other witches, which ensured Hopkins always had another suspected witch to arrest next.
The actions of Hopkins and his assistant John Stearne led to the an estimated 300 investigations for witchcraft; around 112 of those were executed by hanging.