Trial to begin for teen charged in teacher's rape, killing
![Trial to begin for teen charged in teacher's rape, killing](http://bloximages.chicago2.vip.townnews.com/tdn.com/content/tncms/assets/v3/editorial/4/8f/48ffa578-1b9d-51af-aa8a-54d1105a9901/56114dcc29f1d.image.jpg?resize=300%2C438)
BOSTON (AP) — One day in the fall of 2013, Colleen Ritzer asked one of her 9th-grade algebra students to stay after school. Hours later, the body of the popular, 24-year-old teacher was found …