I knew a Catholic woman who was convinced her grandson was possessed by a demon. She had custody of him and his sister, would take him to priests, pastors, rabbis, store-front “psychics”, and even a seventh son of a seventh son who had emigrated illegally from Mexico in the vain hope that someone would remove the demon and make him act more like his older sister (he was 6, she was 10).
About two years after I had met them, the grandma suffered a fatal stroke, and the kids went to live with cousins around Fresno. About a dozen years later, I heard the boy was going into med school.
He was just a normally active, intelligent, and imaginative little boy. Some people seem to use “demon possession” as a way to explain things they don’t understand or can’t control.