In this March 22, 2012 file photo, protestors, Lakesha Hall, of Sanford, center, and her son, Calvin Simms, right, participate in a rally for Trayvon Martin, the black teenager who was fatally shot by George Zimmerman, a neighborhood watch captain in Sanford, Fla. The killing of Trayvon Martin at the hands of a stranger still reverberates 10 years later -- in protest, in partisanship, in racial reckoning and reactionary response, in social justice and social media. (AP Photo/Julie Fletcher, File)