Brian Culkin gave $350,000 to the Church of Scientology over the course of one year. After leaving the group he asked for his money back. Eventually he got a refund but only after signing a declaration that Scientology is using in a court case to deprive other former members of getting their money back.
Wikipedia cite:
{{cite news | author = Mark Bunker | title = Brian Culkin on Scientology | url = https://www.youtube.com/watch?v=R31Ea2FjKhE | work = YouTube | date = July 12, 2013 | accessdate = February 13, 2018 }}
Brian Culkin on Scientology July 12, 2013,
Brian Culkin on Scientology July 12, 2013,