The under-the-radar group that protects pedophile priests.

Clouds hang over The Assumption of the Blessed Virgin Mary Church, also known as Assumption Grotto, in Detroit, Wednesday, May 8, 2019. In the years before the Rev. Eduard Perrone helped start Opus Bono Sacerdotii, he and Assumption Grotto took in at least two priests who had been accused of sexual misconduct at dioceses in other states - including one who later admitted to molesting as many as 50 children in the 1980s and ‘90s, according to court documents in Texas. (AP Photo/Paul Sancya)

The visiting priests arrived discreetly, day and night.

Stripped of their collars and cassocks, they went unnoticed in this tiny Midwestern town as they were escorted into a dingy warehouse across from an elementary school playground. Neighbors had no idea…