sentences:  In February 2013, Cardinal Keith O'Brien, leader of the Catholic Church in Scotland, was forced to resign as archbishop three months ahead of planned retirement because of allegations of inappropriate acts with four priests during the 1980s, but also more recently.O'Brien had been a vocal critic of the UK Government's plans to introduce same-sex marriage.In October 2016, a group in favour of marriage equality in Mexico called the Pride National Front (FON) alleged that a number of Catholic leaders were homosexual.