Article: Portuguese law applied in the former colonies and territories and continues to be the major influence for those countries. Portugal's main police organizations are the Guarda Nacional Republicana – GNR (National Republican Guard), a gendarmerie; the Polícia de Segurança Pública – PSP (Public Security Police), a civilian police force who work in urban areas; and the Polícia Judiciária – PJ (Judicial Police), a highly specialized criminal investigation police that is overseen by the Public Ministry.

Now answer this question: What is the Policia Judiciaria - PJ (Judicial Police)?
a highly specialized criminal investigation police