PARIS, France—A priest was killed Monday in a small town in western France, and the suspect is a man he had housed for months, a local religious leader said. Interior Minister Gerald Darmanin confirmed the killing, adding that he was heading to the Vendee region after the “dramatic assassination.” Full details of the killing, reportedly in the town of Saint-Laurent-sur-Sevre, were not immediately available. The French press, citing police, reported that a man turned himself in, saying that he had killed a cleric Monday morning. French media said the suspect was the man under judicial control for the fire at the 15th-century Nantes cathedral in July 2020, which destroyed the organ and shattered stain glass windows. A conservative senator for the Vendee region, Bruno Retailleau, said he knew the slain priest and identified him as “Father Olivier Maire,” a superior in the Montfort order. A church volunteer from Rwanda seeking …