roa sierra's last visit to gert is reported to have taken place on april 7, two days before gaitán's assassination. gert declared that roa sierra had had a dream about treasure in two indigenous towns not too far from bogotá, and that he felt destiny was going to give him something important. gert suggested that he not go alone, but roa sierra rejected this. on this same date roa sierra purchased the weapon and the next day he bought the ammunition. brothers luis enrique and josé ignacio rincón, workmates of roa sierra at the time of the events, testified it was from them that he had bought the defective murder weapon for 75 pesos after assuring them he needed it to go treasure-hunting with some foreigners.