Read the story about the e-mail Palin signed from "Your Heaveny Father."
By Richard Allen Greene, CNN
(CNN) - As a young man studying for the priesthood, Patrick Wall imagined life as a professor and football coach at a Catholic university.
It didn't work out that way. Two decades later, Wall has not only left the Catholic Church, he has become one of its most tireless opponents.
He's an ex-priest, driven from ministry by the feeling that his superiors used him to help cover up sex abuse by other clergymen.
And he's using the training he gained as a priest to work with victims of abuse who want to take the church to court.
Since 1991, Wall says he has consulted on more than 1,000 abuse cases, helping lawyers pick apart defenses mounted by dioceses from Alaska to Australia.
The CNN Belief Blog covers the faith angles of the day's biggest stories, from breaking news to politics to entertainment, fostering a global conversation about the role of religion and belief in readers' lives. It's edited by CNN's Daniel Burke with contributions from Eric Marrapodi and CNN's worldwide news gathering team.