The authorities on Wednesday said they had charged two sergeants in the country’s National Guard in the death of a 23-year-old woman who was shot during antigovernment protests. The shooting of the woman, Geraldín Moreno, in February in Valencia, the country’s third-largest city, provoked outrage and fueled allegations that the protests sweeping Venezuela in recent months had been violently repressed. Witnesses said that Ms. Moreno was on the ground when a soldier shot her in the face at close range. President Nicolás Maduro has said repeatedly that his government defends human rights and that it is vigorously investigating allegations of wrongdoing by security forces. A human rights lawyer, Gonzalo Himiob, pointed to an apparent lack of progress in other investigations and questioned the government’s commitment to holding violators accountable.