LAFAYETTE, Ind. (AP) — A Lafayette woman who police say deliberately posted a nude photo of her teenage daughter on the girl's Facebook page faces charges of child exploitation and child pornography possession.

The felony charges filed Wednesday in a Tippecanoe County court allege the 50-year-old woman posted the photo in November 2011. Detective Mark Pinkard tells the Journal & Courier that investigators spent a year collecting evidence, including issuing subpoenas to Facebook and the teen's cell phone provider.

A probable cause affidavit says the girl took the photo of herself but that her mother had possession of the phone when the picture was uploaded to Facebook.

The child exploitation charge carries a potential sentence of six to 20 years in prison.

Efforts to reach the woman were not successful.