What's a trainer to do?

Today as I was conducting a very serious restraint training, one of my trainees shared a story about a time she "threw a kid off her niece" during a child scuffle. The irony was not lost on me. Although I was completely shocked, I continued the training without reprimanding her for her obvious assault on a child, I chose to not give her a platform. Now I wonder if I should have instead used her as an example.