Private schools, like in Wisconsin shooting, are responsible for their security. Here’s how they try to protect students

When a student carried out a shooting at Abundant Life Christian School this week, there was no school resource officer on site. And when six people were killed last year at another private Christian school in Nashville, there wasn’t one either.

​ When a student carried out a shooting at Abundant Life Christian School this week, there was no school resource officer on site. And when six people were killed last year at another private Christian school in Nashville, there wasn’t one either. Read More Breaking News, Latest News and Videos | CNN