A Newport Tennessee Woman Who Plead Guilty Earlier In U.S. District Court In Greeneville To Possessing Child Pornography, Has Been Ordered To Spend Time In Prison. 23 Year Old Sierra Messer Was Sentenced To 13 Years 6 Months. Prosecutors Said She Had Collected 172 Digital Photos And 12 Videos Of Children. The Investigation Was Conducted By U.S. Homeland Security And Knoxville Police Department’s Internet Crimes Against Children Task Force.