In 1960, angered by the deeply skewed land deals between the right-wing dictatorship and US companies such as United Fruit, a group of left-wing army officers tried to wrest control of Guatemala. They failed and over the ensuing 36 years, tacitly aided by Washington, the government coordinated the murder and disappearance of an estimated 200,000 people, most of them indigenous Maya civilians. In her video La Verdad (2013), for more than an hour, the Guatemalan performance artist Regina José Galindo reads out traumatic testimonies from the victims of these events. Shot from a single static camera, it is the first of three documentary works in this small show, each of which is given its own room. Galindo wears a white top against a black background, reading in monotonous Spanish from a stapled block of paper: “they took out the baby and tied it up and there were some who got together to make a fire.” It continues in this gruesome and unsettling vein until, around five minutes in, a man enters the frame. Galindo stops reading and puts her head back. The man injects a dental anesthetic into her gums. As the drugs begin to work, the artist continues, her …