When it comes to catching pedophiles, this dog is on the nose.In Mexico City a recent four-legged police academy graduate named Hidu got the goods on a high-profile criminal suspect by sniffing out triphenylphosphine oxide, or TPPO, a chemical coating used in electronic devices. Hidu used his sense of smell to hunt down alleged evidence of child pornography in the Mexico City apartment of Jason Maatman, a Dutchman who promotes sex with kids.
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