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arguido

n. A person kept for questioning who is not a formal suspect.

Wikipedia
Arguido

Arguido (male, ) or arguida (female, ), normally translated "named suspect" or "formal suspect", is a status in Portuguese type legal systems, including those of Portugal, Angola and Mozambique. It is given to a person whom the authorities suspect may have committed an offence. This designation does not exist in certain other jurisdictions. In a criminal investigation a person has to be declared an arguido prior to being arrested. Portuguese law makes a distinction between ''arguido ''and suspect.