Paris Hilton has returned to the Utah boarding school where she said she was abused as a teenager. It's the latest stop in her yearslong campaign calling for reforms to what is commonly known as the troubled teen industry. Hilton was speaking in support of families who sued Monday alleging their children were mistreated at Provo Canyon School. Hilton spent 11 months there in the late 1990s. The hotel heiress called on licensors to shut down the school. She has testified about her experiences there in Congress and state legislatures. The school said in a statement that safety is its highest priority.