ONTARIO, Ore. - Authorities say a high school social studies teacher in Ontario has been accused of soliciting sex with a 13-year-old who was really an adult acting as a decoy.

Joseph Garner was charged with online sexual corruption of a child after a three-month investigation touched off by a private organization that identifies sexual predators on the Web.

Malheur County District Attorney Dan Norris said the Oregon State Police traced communications to the 42-year-old Garner's computer account.

The Ontario School District said Garner resigned after he was arrested Wednesday.