The purpose of this article is to link the assessment of the key evidentiary elements, which are demostrative o the existence of the so called periculum in mora into the complex meaning of circumstantial evidence. If prison on remand is adopted by the judge on the basis of a presumption, which builds on circunstancial evidence, that decision reveals the cautionary risks that justify it, so there is not arguments for not aplying the elements of that kind of evidence to judicial reasoningEl objeto del presente trabajo es el de vincular la apreciación de los elementos o indicios que acreditan el periculum in mora al complejo que constituye la prueba indiciaria. Si la prisión provisional se adopta sobre la base de una presunción, que se construye sobre indicios que revelan los riesgos cautelares que la justifican, carece de justificación no aplicar al razonamiento judicial los requisitos de dicha prueba