Through a multilevel approach, the text describes and analyzes a case of sexual abuse perpetrated and continued to the detriment of five children, came to our observation in the field expert, committed by a person who "impersonating" for a Catholic priest. The various aspects considered (psychiatric, psychological, forensic, ethno-anthropological and communicative) reveal dynamic situations and specific meanings, so that only the interaction between different but complementary perspectives can lead to a deeper understanding of the uniqueness of the case examined, illustrating in an exemplary way the dense web of disturbances caused by a double mockery of the trust which the primary relationship of human sociality.