The Dallas school district apologized for not providing guidance to parents when it sent students home with a book that teaches how to respond to dangerous situations at school.
As investigators searched for a motive in the killing of six people at the Covenant School in Nashville, the close-knit community there was struggling with the enormity of its loss.
The brazenness of the thefts brought international attention and a range of whodunit theories. The police charged a 24-year-old local man in connection with the disappearances.