In Argentina, dozens gathered Tuesday to mark the first anniversary of the disappearance of a key witness whose testimony helped convict a former chief of police. Seventy-seven-year-old Jorge Julio López went missing just one day after Police Commissioner Miguel Etchecolatz was sentenced to life in prison for murder, torture and kidnapping during Argentina’s “Dirty War.” This is López’s son, Ruben López.

Ruben López: “We are living in a democracy. My father is missing. We can’t permit this in our country.”

The elder López had testified about his kidnapping and torture at the hands of the Argentine dictatorship 30 years before. Many believe he was kidnapped again to deter other witnesses from coming forward.