This chain was employed in a campaign against the Revolutionary Left Movement (MIR) initially, and later, against other left-wing organizations in Chile, including the Socialist and Communist (PC) parties.

Never before, nor afterward, during the seventeen-year span of the military dictatorship, were such a significant number of individuals subjected to forced disappearances and/or executions in the Metropolitan Region during a single repressive campaign.

By the end of 1974, when the facilities at José Domingo Cañas and Villa Grimaldi became operational, this site was shut down, and its prisoners were dispersed among other secretive detention centers.

During these interrogations, the prisoners were subjected to beatings, sometimes resulting in fractures, the pau de arara technique (which involves contorted positions on a bar), both dry and wet forms of the submarine (simulated drowning), electric shocks applied on la parrilla, hanging, cigarette burns, el teléfono (slapping both ears with open hands), and even forced to play Russian roulette.

[4] This Institute is an organization affiliated with the Chilean Army and was chaired for decades by retired General Washington Carrasco, who played an active role in the repressive actions carried out immediately after the 1973 coup in the Biobío Region.

In February 2006, the O'Higginian Institute put the property up for sale through a public auction, but this attempt could not be realized due to the active opposition of human rights organizations and the complexities involved in selling such a Historical Monument.

[6] Today, in remembrance of those who were detained and lost their lives at Londres 38, the house is open to the public, offering guided discussions to educate people about all that transpired within its walls.