1
as in researcher
one who observes or studies by close examination and systematic inquiry investigators who discovered new evidence that the universe was much older than had been previously estimated

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2
as in detective
a person not on the police force who investigates criminal or illicit activity or searches for missing persons the investigator in charge of the case was touted as an expert at tracing stolen art

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Recent Examples of investigator Jung Yeon-je/AFP via Getty Images SEOUL and LONDON -- The two survivors of South Korea's deadliest plane crash in decades were recovering at separate hospitals in Seoul on Monday, as investigators began far-reaching probes into both the fatal crash and the country's broader aviation operations. Joohee Cho, ABC News, 30 Dec. 2024 Brazilian authorities faced difficulties identifying victims due to a post-crash fire, with investigators from Brazil's Aeronautical Accidents Investigation and Prevention Center (CENIPA) citing weather conditions and pilot error as contributing factors. Andy Biggs, Newsweek, 26 Dec. 2024 The recorded voice spoke in Spanish, but investigators translated it to English. Kfox Staff, Baltimore Sun, 25 Dec. 2024 As more search warrants were served, investigators suspected others close to Noel could face charges as well. Leo Bertucci, The Courier-Journal, 24 Dec. 2024 See all Example Sentences for investigator 

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“Investigator.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/investigator. Accessed 20 Jan. 2025.

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