Tens of thousands of Argentines marched in the capital of Buenos Aires to condemn violence against women, the latest public outcry following the brutal killing of a 16-year-old girl who was drugged, raped and tortured.

Lucia Perez was killed in the coastal city of Mar del Plata earlier this month. Authorities say she was forced to consume cocaine, and was later raped and impaled by two men who have been arrested. The prosecutor investigating the crime called the attack “an act of inhuman sexual aggression.”