On April 18, 1614, the Dominican friar Joon Falcón, who had been a prisoner in Araucanía for nearly 14 and a half years, appeared before the Cabildo de Santiago (destruction of Valdivia, November 24, 1599, Declaration of fray Juan Falc6n, April 18 of 1614). The Spanish authority required authorized information about the fate of the Spanish captives and to know the designs of the war Indian, two years after starting a policy of peace and coexistence with the Mapuche (defensive war). The priest had to answer the questions he was asked under the prevailing legal requirements in Hispanic institutions. The document has testimonial value. In some parts the text acquires a strong emotional tone due to the dramatic circumstances that the father had to experience in his captivity. In order to achieve a more objective and complete analysis, the statement of the Dominican friar will be compared with other sources of that century.