Demon
The contemporary Roman Catholic Church unequivocally teaches that angels and demons are real beings rather than just symbolic devices. The Catholic Church has a cadre of officially sanctioned exorcists which perform many exorcisms each year. The exorcists of the Catholic Church teach that demons attack humans continually but that afflicted persons can be effectively healed and protected either by the formal rite of exorcism, authorized to be performed only by bishops and those they designate, or by prayers of deliverance, which any Christian can offer for themselves or others.
Vince Lampert
Father Vince Lampert received his exorcism classroom training at the Pontifical North American College in Rome,Italy. He was in the same training class with Father Gary Thomas, the exorcist for San Jose, California US. Matt Baglio wrote the book, "The Rite: The Making of a Modern Exorcist" based on Father Gary Thomas, that later became the 2011 movie, The Rite. Father Lampert received practical experience, by assisting on over 40 exorcisms with Father Carmine de Filippis, who is the mentor for exorcists in the Diocese of Rome. While speaking to students about exorcism at Seton Hall University about his training, he told them he spent three months training to be an exorcist.