After the end of Francoism, Luis started to speak about his experiences during the war and the dictatorship. He won a case against the Basque government about the compensation of victims of war who, like him, did not have documents that verified their pass through the Francoist forced labor camps. He has given his testimony in various documentaries about the French concentration camp Gurs and he was one of the plaintiffs of the Argentinian lawsuit against the crimes of Francoism.