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.
Vince Lampert
The Reverend Vincent Lampert, MDiv, is an American Roman Catholic Priest and the designated exorcist of the Roman Catholic Archdiocese of Indianapolis. Father Lampert was appointed to become an exorcist by Archbishop Daniel M. Buechlien. He is one of the few exorcists known to use social media like Twitter ( @FrVinceLampert ) on a regular basis. In one article he told the reporter that he is fighting the devil by tweeting about exorcism.