Exorcism
In Catholic practice the person performing the exorcism, known as an exorcist, is an ordained priest. The exorcist recites prayers according to the rubrics of the rite, and may make use of religious materials such as icons and sacramentals. The exorcist invokes God—specifically the Name of Jesus—as well as members of the Church Triumphant and the Archangel Michael to intervene with the exorcism. According to Catholic understanding, several weekly exorcisms over many years are sometimes required to expel a deeply entrenched demon.
Gabriele Amorth
Amorth was also interviewed for the second episode of "True Horror with Anthony Head", presented by Anthony Head. He explained he would never perform an exorcism based solely on someone's claims of possession; always directs people to psychiatrists and doctors first, and that when he sees someone is not possessed but the person still insists, he replies: "You have no devil. If you have a problem, talk to a good vet."