In September 2019, the Plenary of the Congress of Deputies approved, by 269 votes in favour, the consideration of the reform of the Criminal Procedure Law, in order to repeal the maximum period provided for the investigation phase. In this article, we intend, away from the political noise and the debate that has been unleashed, to make a serene reflection on this issue, as well as the problems presented by the current system of deadlines of instruction that could be repealed in the light of doctrine and jurisprudence relapse during its lifetime.