(JEFFERSON CITY, Mo., AP) — A retired Missouri teacher has pleaded guilty to a federal charge after placing an online ad for a couple who “would like to include their kids in sexual fun.”

The Kansas City Star (http://bit.ly/1R2DI8V ) reports that 71-year-old Paul Robert Cannon, of Sedalia, entered the plea Tuesday. He described himself as a grandpa and retired teacher in the advertisement he placed on Craigslist in January.

Federal prosecutors say a Boone County deputy responded to the ad, posing as the mother of a 14-year-old daughter. He was arrested after going to a restaurant in Columbia to meet with the woman and child.

The charge of attempting to induce a minor to engage in illicit sexual activity carries a sentence of 10 years to life in prison. A sentencing date hasn’t been set.

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Information from: The Kansas City Star, http://www.kcstar.com