1. A person who is hired to conduct investigations and gather information for private clients, often for legal proceedings, infidelity cases, or corporate matters
The lawyer hired a private investigator to gather evidence for the case.
O advogado contratou um investigador privado para reunir provas para o caso.
2. A licensed professional who works independently or for an agency to conduct surveillance and research
The private investigator followed the suspect for three days.
O investigador privado seguiu o suspeito por três dias.