Police Chief Don Byington would not identify the youths involved, but told The Clarion-Ledger the posting was "a bad practical joke."
Byington says the 18-year-old student at Clinton High took a photo of an unknown baby boy and placed the ad on Craigslist to give away - not sell - the baby. He says police interviewed the student Monday.
Prosecutors say the posting of such information can be prosecuted under state law that makes the "posting of messages through electronic media for the purpose of causing injury to another person" a felony.
