At the end of 2015, the Spanish legislator modified its Law of Criminal Procedure (the original text dates from 1882) to introduce technological investigation procedures in favor of a more modern, current, digital instruction and, in any case, respectful of rights fundamentals of citizens. This paper analyzes these acts of instruction, the regulation of which, although necessary, could have been more refined. Thus, the criminal procedural norm incorporates common precepts to heterogeneous measures, some of which are contradictory and the regulation of seven proceedings with different levels of affectation of fundamental rights useful in the criminal police investigation.Tiene por objeto estudiar críticamente las diligencias de investigación tecnológica en pro de una instrucción más moderna y digital, introducida a fines del año 2015 por el legislador español, mediante una modificación a la Ley de Enjuiciamiento Criminal.