Friedrich Spee von Langenfeld book Cautio Criminalis
Cautio Criminalis, or: Legal concerns about the witch trials. German by Joachim-Friedrich Ritter. Böhlaus Nachf. Weimar 1939. page 93
Friedrich Spee was a German Jesuit priest, professor, and poet, most noted as an opponent of trials for witchcraft. Spee was the first person in his time to present strong written and spoken arguments against torture, especially with regards to its unreliability in obtaining "truth" from someone undergoing painful questioning.His name is often incorrectly cited as "Friedrich von Spee".

Friedrich Spee von Langenfeld book Cautio Criminalis
Cautio Criminalis, or: Legal concerns about the witch trials. German by Joachim-Friedrich Ritter. Böhlaus Nachf. Weimar 1939. page 93