police shoot black teen michael brown hand ferguson missouri white cop darren wilson ignite national firestorm regard fact cop often shoot kill unarm black people little exist birth blacklivesmatter movement protest unrest violence baltimore death freddie gray yet another african american man die hand police since national protest across nation one man rise prominence activism advocacy blacklivesmatters activist deray mckesson.mckesson currently activist passion trade baltimore return hometown little year ago become famous commentary racist police anti-black violence twitter prolific use social media grind live commentary mean many people begin look man could trust provide truth even cop busy try cover announce run mayor baltimore.calling son baltimore mckesson say mayoral bid commitment usher city era government accountable people aggressively innovative identify solve problems 30-year-old modern day civil right icon tweet intention run late wednesday night file paper run baltimore mayor democrat run mayor baltimore https //t.co/tyq58aoxyp deray mckesson deray february 2016godspeed man need people call system unafraid explain stack black people cost many us live field definitely huge 28 candidates count brother.featured image twitter blacklivesmatter leader run mayor racially trouble baltimore tweet