Public records offer new details about a Louisville Metro Police investigation into whether an officer used the city’s license plate reader network to aid federal immigration enforcement.

LMPD opened the inquiry into Officer Wesley Troutman after the Kentucky Center for Investigative Reporting found he listed a keyword related to U.S. Immigration and Customs Enforcement as the reason for more than 100 searches he ran on the city’s license plate reader database.

KyCIR obtained public records that show LMPD Chief Paul Humphrey ordered the department’s Professional Standards Unit to launch the investigation on Halloween — four days after KyCIR informed LMPD of its findings and requested a comment for the resulting article.

The article published on Nov. 3. That same day, records obtained la

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