A California college student used a Snapchat filter to pose as an underage girl online in an effort to catch sexual predators. The pedophile he caught was a San Mateo police officer.

Ethan, 20, a California college student used a Snapchat filter to pose as an underage girl online in an effort to catch sexual predators. Esther was contacted by a male Tinder user. San Mateo Police Officer Robert Davies, 40, began talking with the person he thought was Esther on Tinder on May 11 . San Mateo police then served search warrants on Davies’ electronic devices, mobile applications and at his home.

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