Bogas, VanessaNeves Cardoso, Paula LilianaVentura Teixeira Bento, Ana MargaridaCorte Real Gonçalves, FranciscoBrito, Pedro2026-01-222026-01-222025-05Bogas V, Cardoso PL, Bento AM, Corte Real F, Brito, P. The importance of staff genetic profiles in DNA databases. In: Butler JM, Carracedo A, Lareu MV, ( et al.) editors. 30th Congress of the International Society for Forensic Genetics - Proceedings; 2025, September, 9-13; Santiago de Compostela: Universidad de Santiago de Compostela; 2025. p. 443-446http://hdl.handle.net/10400.26/61132The Portuguese DNA profile database for civil and criminal investigation was approved in 2008 and by the end of 2023, had a total of 23775 genetic profiles. Around 30% of the profiles were from samples collected as evidence for criminal investigation purposes and 2% were staff profiles. The primary objective of DNA databases is to help criminal investigations, by detecting matches between profiles from samples collected at crime scenes and profiles from convicted offenders allowing the identification of the perpetrator who left biological traces at a crime scene. Nearly 1% of the national matches in the Portuguese DNA database resulted between crimes scene samples and staff. The aim of this work is to emphasize the importance of the inclusion of the staff profiles in the national DNA database, leading to identify possible cross-contaminations.engElimination DNA databasestaff profilesresearch articlehttps://dx.doi.org/10.15304/cc.2025.1869