Southeastern region and merges information from both the Federal Police and various state-level law enforcement agencies (e.g., Military and Civil Police). While both datasets share a broadly similar structure, the southeast dataset includes additional fields specific to the States of São Paulo, Rio de Janeiro, Minas Gerais, and Espírito Santo. These datasets are intended to facilitate research into firearm seizure patterns and trends in Brazil. The values for most categorical fields are presented in Portuguese, as they mirror the official terminology used by the corresponding agencies. Both datasets include temporal, geographical, and operational information (such as the seizing agency or firearm type), enabling comprehensive analyses of firearm-related incidents. Researchers who use these datasets should take into account the institutional variations in data collection across different regions and the unique categorisations employed by Federal and State authorities. Moreover, the data must be handled with due respect for any legal and ethical constraints concerning law enforcement information. Name: db_national.csv Sources: Federal Police Department, Ministry of Justice and Public Security Column Meaning Type of data Possible values (if categorical) Index Identifier of the record Number source_origin The institution that collected the data Categorical pf (Federal Police), mj (Ministry of Justice and Public Security) federal_unity_seizure The Brazilian state where the seizure occurred Categorical AC, AL, AM, AP, BA, CE, DF, ES, GO, MA, MG, MS, MT, PA, PB, PE, PI, PR, RJ, RN, RO, RR, RS, SC, SE, SP, TO year Year of the seizure Number type Type of firearm Categorical carabina, espingarda, fuzil, garrucha, metralhadora, pistola, revolver quantity Number of firearms seized Number Name: db_southeast.csv Sources: Federal Police Department, São Paulo State Public Security Secretariat, Espírito Santo Civil Police, Rio de Janeiro - Institute of Public Security and Minas Gerais State Secretariat for Justice and Public Security Column Meaning Type of data Possible values and examples (if categorical) Index Identifier of the record Number year Year of the seizure Number manufacturer Manufacturer of the firearm Categorical taurus, colt, cbc, s&w type Type of firearm Categorical espingarda, fuzil, pistola, revolver, calibre Calibre of the firearm Categorical