Arnaldo Pagliarini Lerma (November 18, 1950 – March 16, 2018) was an American writer and activist. He was a former Scientologist, and critic of Scientology. He appeared in television, media and radio interviews. Lerma was the first person to post the court document known as the Fishman Affidavit, including the Xenu story, to the internet via the Usenet newsgroup alt.religion.scientology. He was a strong critic of L. Ron Hubbard. He was born in Washington, D.C..