SALT LAKE CITY, UTAH — An 81-year-old substitute teacher was arrested after a student allegedly caught him engaging in inappropriate behavior inside an empty classroom at Clayton Middle School. The incident, which occurred on March 18, has raised serious concerns among parents, students, and school officials about safety protocols and the adequacy of background checks for substitute teachers. The teacher, whose identity has not been publicly released, was arrested on one count of lewdness involving a child. He was subsequently booked into custody following an investigation by the Salt Lake City Police Department. In a statement issued to the Clayton…