On behalf of the Holy Office, Gemelli re-examined Padre Pio in 1925, writing a report in April 1926. This time Pio allowed him to see the wounds. Gemelli saw as its cause the use of a corrosive substance. Pio had attached himself to these wounds. The Jesuit Festa had previously tried to question Gemelli's comments on stigmata in general. Gemelli responded to this criticism in his report and resorted to responding to his knowledge of self-inflicted wounds. He therefore clarified his statements about the nature of Pio's wounds: "Anyone with experience in forensic medicine, and above all in variety by sores and wounds that self-destructive soldiers were presented during the war, can have no doubt that these were wounds of erosion caused by the use of a caustic substance. The base of the sore and its shape are in every way similar to the sores observed in soldiers who procured them with chemical means."