In March 2009, the magazine "CartaCapital" published previously unreleased documents of the National Information Service created by an undercover agent who was present at Jango's properties in Uruguay. This revelation reinforces the theory that the former president was poisoned. The Goulart family has not yet identified who could be the "B Agent," as he is referred to in the documents. The agent acted as a close friend to Jango, and described in detail an argument during the former president's 56th birthday party with his son because of a fight between two employees. As a result of the story, the Human Rights Commission of the Chamber of Deputies decided to investigate Jango's death.