Michael Brown is only the latest in a long list of black men and boys who have died under eerily similar circumstances.
The marchers, from all five New York City boroughs, called for reforms in the process of disciplining police officers who use unlawful force, and in police officer training.
The pro-Darren Wilson folks were screaming rage-soaked insults, but the protestors stoically chanted back in unison.
"The people in this crowd should have this amazing view: It's a sea of people of every culture and heritage coming together for change."
"This is a major victory upholding the fundamental constitutional rights of people to engage in First Amendment-protected activity in New York City."
"I wanted to raise awareness about this issue and to support the people of Ferguson to let them know there are people here on the west coast who care about them."
They walked in silence holding signs that read "Hands Up - Don't Shoot" and posters with the names of victims of police brutality from around the country including New Haven.
As the mile-long column marched down the main street of Florissant, whole families poured from their doors and joined the procession: the peoples' struggle is the workers' struggle.
The interviews with people in Ferguson demonstrate how what should have been a week of peaceful protest became for Ferguson the trauma of experiencing police terrorism.
"Due to huge turnout, it took me hours to travel the two miles from my home to the site of a rally in a packed church Sunday, a day of healing, a day of looking for answers."