private investigator

noun

Abbreviation: PI, p.i., P.I.

Origin

1935-40

Examples from the web for private investigator

He also claimed that he was a registered private investigator, seeking to probe the illegal trade of uranium.
Now that the bat-wielding, wiretapping private investigator is behind bars, they're downright terrified.
She hired a private investigator to find out who her husband really was.
Consider hiring a private investigator to perform a background check before you make any commitment.
Besides individual investigators, the law also requires licensing for private investigator agencies, some employees and trainers.
State regulators enforcing private investigator licensing requirement.