Andreolla, Andrey HenriqueGanassini, Ane Caroline2024-03-042024-03-042021https://repositorio.uricer.edu.br/handle/35974/569For many years, the field of forensic sciences has been working in search of a clear and as lawful investigation as possible, seeking more precise and concrete results in each case. The expert evidence, in turn, deals with scientific analysis carried out by technicians or specialists under something or people, aiming to extract information in order to clarify a certain fact. In this regard, the chain of custody institute was created, which aims to document the chronological history of the expert evidence from the moment the competent authority becomes aware of the facts until the end of the criminal action, with its due filing. It can be said that this institute has the function of maintaining the evidential value of the evidence, through its completeness, authenticity and suitability. For this it is necessary to follow, necessarily, the procedures defined in the Decree nº 82 da SENASP (Secretaria Nacional e Segurança Pública do Ministério da Justiça) and recently brought by the Law nº 11.964/2019 (Pacote Anticrime), in articles 158-A to 158-F, included in the Code of Criminal Procedure. However, it happens that without observing such procedures, there is a great possibility that the evidence will be subject to adulteration and, consequently, be contaminated, leading the judge to error. In this context, the objective of the present course conclusion paper is to analyze the legal consequences of recognizing the break of the chain of custody. Legislation, doctrine and jurisprudence make it possible to visualize some situations that demonstrate how the legal consequences affect, in fact, when the illegality of the evidence produced is proven. To carry out the research, we used the technique of bibliographic and documentary research, through consultation in books, jurisprudence and legislation; the inductive approach method and the analytical-descriptive procedure method.pt-BRDireitoCadeia de custódiaProva ilícitaProva pericialTrabalho de Conclusão de Curso