When white people re-examine their life through the "What if I was not white?" lens, they often have important revelations. This is an important practice for allies to do. In addition to teaching that general practice, this piece might be useful in a discussion about police and/or unconscious bias.  

https://www.washingtonpost.com/amphtml/opinions/im-living-proof-of-the-parallel-racial-universe-of-police-stops/2017/06/17/90783cc4-537d-11e7-be25-3a519335381c_story.html