Riesinger was born in Germany. He later moved to the United States where he entered the Capuchin Order. He did his studies to prepare for the priesthood at St. Anthony Friary in Marathon, Wisconsin, where he was ordained on May 29, 1899. In the summer of 1928, due to his previous experience in dealing with possessions, he was requested by the Bishop of Des Moines to conduct the rite of exorcism on a forty-year-old woman who was suspected of being possessed. While preaching a parish mission in St. Joseph Parish in Earling, Iowa, he asked the permission of the pastor to conduct the ceremony in the parish. Receiving that, he chose a convent of Franciscan Sisters on the outskirts of the town for its privacy.
After 23 days of performing the exorcism Riesinger was exhausted. Finally, two days before Christmas of that year, the demons were finally driven out and the woman cried, “My Jesus! Mercy! Praised be Jesus Christ!”
The case became famous worldwide and was written about, in Germany, by the Rev. Carl Vogl. This article was seen and was translated into English in 1935 by a Benedictine monk of Saint John's Abbey in Minnesota, Celestine Kapsner, O.S.B., as Begone Satan. Riesinger himself wrote about the case in a 1934 book called The Earling possession case: An exposition of the exorcism of 'Mary', a demoniac. Another book about the case is The Devil Rocked Her Cradle, by David St. Clair (Dell, 1987).
- "History of St. Anthony's". St. Anthony's Spirituality Center.
- Kapsner, Celestine, O.S.B., Rev. (1935). Begone Satan!.
- Time Magazine, Exorcist & Energumen, February 17, 1936
- Jacob or Simon Riesinger of Snohomish, WA, Bren Bornyasz, November 17, 2007.