# Próvolo Institute abuse case legal developments > Live situation record from CLSTR: https://clstr.news/situations/prvolo-institute-abuse-case-legal-developments > Updated: 2026-08-24T13:49:18.000Z. Sources: 33. Developments: 2. The Supreme Court of Justice of Mendoza has overturned the 2023 acquittal of Kumiko Kosaka, a former nun, in a high-profile sexual abuse case involving deaf and mute children at the Antonio Próvolo Institute. In a decision reached by a 2-to-1 vote, the court found Kosaka responsible for several sexual offenses committed against students between 2004 and 2016. Specifically, the ruling identifies her as a participant in two instances of abuse committed by priest Horacio Corbacho and as the perpetrator of three counts of simple sexual abuse. While the court overturned her previous acquittal, it upheld the acquittals of eight other women involved in the investigation. A lower court will determine the final sentence, which could reach up to 50 years in prison. The Próvolo case remains one of the most significant child abuse scandals involving the Catholic Church in Argentina. ## Timeline ### 2026-08-24: Mendoza court overturns acquittal of nun in Próvolo Institute abuse case An Argentinian court has overturned the acquittal of former nun Kumiko Kosaka, finding her guilty of sexual abuse against deaf children at the Próvolo Institute. Sentencing is pending. 6 sources. https://clstr.news/cluster/mendoza-court-overturns-acquittal-of-nun-in-prvolo-institute-abuse-case ### 2026-08-21: Kumiko Kosaka: Mendoza court overturns acquittal in Próvolo abuse case Argentina's Mendoza Supreme Court overturned the acquittal of former nun Kumiko Kosaka, who now faces up to 50 years in prison for the sexual abuse of deaf children at the Instituto Próvolo. 27 sources. https://clstr.news/cluster/cristina-lombana-defends-judicial-conduct-in-martha-peralta-case --- Cite as: Próvolo Institute abuse case legal developments. CLSTR, https://clstr.news/situations/prvolo-institute-abuse-case-legal-developments