A 53-year-old man is suing the Catholic Church and former Guam priest Louis Brouillard, alleging Mr Brouillard sexually abused him more than 40 years ago.
The man, identified by his initials R.P, was an altar boy for the Catholic Church in Guam.
He alleged that during a Boy Scouts event to recruit members, Mr Brouillard entered his and another boy's tent, exposed his private parts and made them touch him.
The lawsuit alleged other priests in the church knew about Mr Brouillard commiting sexual abuse and "deliberately remained quiet".
The man, represented by attorney David Lujan, is suing the church, Mr Brouillard and the Boy Scouts of America for $US10 million in damages.
Mr Brouillard was also a scout master while he was a priest on Guam.
In April, the Pacific Daily News reported that the number of clergy sex abuse lawsuits in the territory was 40.