My 11th great grandfather, Edward Croft was tried for sorcery: the specific charge was compassing the death of another person. The witchcraft was a risky daring measure.
In the the late 1580s, his father, Sir James Croft, of Croft Castle, Herefordshire, was the Comptroller of Queen Elizabeth's Royal Household and a Privy Councillor who was involved in the trial of Mary Queen of Scots. James went to see the Italian Governor of Holland, the Duke of Parma in Holland, to negotiate a treaty. Unfortunately he didn't speak any of the languages involved and came back with a poor deal. He was suspected of treason and imprisoned in Fleet Prison.
Edward was incensed and went to a conjuror, John Smith in London. He was asked to come back with the names of the councillors written on paper. John pointed to the name of Robert Dudley, Earl of Leicester, and the Queen's favourite. With a flick of his hand he said "The Great Bear is muzzled".
Robert died a few days later of a stomach complaint. The trial outcome is unknown, but Edward was later imprisoned for debt, promised to pay if he were released, and instead absconded to Holland.