person of interest
sõltub kontekstist, sageli tähendab kahtlusalust;
DoD kontekstis: isik, kelle kohta on teabevajadusi või teabe leidmise eesmärke
(law enforcement) someone who police have reason to believe may have a connection to a crime, or to possess important information relating to that crime, but who has not been accused or charged by authorities nor been officially deemed to be a suspect
This is an informal, nonspecific term, typically used precisely in order to avoid publicly labeling someone as a suspect without sufficient evidence.