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This May 2022 handout photo released by Operation Underground Railroad shows Hidu, an electronics detection dog, trained to sniff out a certain chemical used in the manufacture of small memory devices like flash drives, in Indianapolis, Indiana. The anti-sex-trafficking group loaned Hidu to help Mexico City prosecutors search the apartment of a suspected Dutch child pornography promotor arrested in early June. Hidu sniffed out a hidden cell phone and hard drives that authorities said were filled with child porn images. (Operation Underground Railroad via AP)

This May 2022 handout photo released by Operation Underground Railroad shows Hidu, an electronics detection dog, trained to sniff out a certain chemical used in the manufacture of small memory devices like flash drives, in Indianapolis, Indiana. The anti-sex-trafficking group loaned Hidu to help Mexico City prosecutors search the apartment of a suspected Dutch child pornography promotor arrested in early June. Hidu sniffed out a hidden cell phone and hard drives that authorities said were filled with child porn images. (Operation Underground Railroad via AP)

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