Devin Brosnan likely won't break 'blue wall of silence' to testify against Garrett Rolfe. Here's why police stick together. - USA TODAY

Police officers rarely testify against one another, often choosing instead to trust their partners and "circle the wagons." https://www.usatoday.com/story/news/nation/2020/06/18/rayshard-brooks-officer-devin-brosnan-testify-against-garrett-rolfe/3211966001/