Lezley McSpadden (right) led a march to the street where her son, Michael Brown, died two years ago in Ferguson, Mo. Gwen Carr, mother of Eric Garner, is dressed in blue, and Samaria Rice, mother of Tamir Rice, is dressed in white. Both Eric Garner and Tamir Rice died in high-profile incidents with police.
Durrie Bouscaren/St. Louis Public Radio