Steven Berkowitz of the Perelman School of Medicine offers suggestions on how teachers and parents should speak to children about violence.
https://www.washingtonpost.com/local/education/how-should-teachers-and-parents-talk-to-kids-about-police-violence/2016/07/09/ac7fea1a-451f-11e6-bc99-7d269f8719b1_story.html The Washington Post