It's the fastest growing petition in internet history.
Wednesday night, they spoke in front of a crowd wearing hooded sweatshirts here in Union Square, believing the support they got here will get the justice they seek.
It was a rally with a specific goal: justice for 17-year-old Trayvon Martin.
The Million Hoodies March drew more than 2,000 people to Union Square.
His parents' voices empowered the crowd.
"You probably don't know. You probably don't understand how much you guys mean to us. But it's the support that we need. We need this kind of support. Our son was not committing any crime. Our son is your son. I want you guys to stand up for justice and stand up for what's right. This is not about a black and white thing. This is about a right and wrong thing. Justice for Trayvon," his mother said.
The Florida boy was wearing a hoodie and carrying a soda and a pack of Skittles when he was confronted then shot and killed walking to his family's home.
Much of nationwide outrage came after 911 calls were released.
Dispatcher: "Are you following him?
Zimmerman: "Yeah."
Dispatcher: "Okay. We don't need you to do that."
Zimmerman: "Ok."
That's the voice of George Zimmerman, a neighborhood watch captain, a man tired of recent break-ins near his home outside Orlando.
Zimmerman was not charged or arrested for allegedly shooting and killing Martin.
Police are investigating whether it was self defense or murder.
"Trayvon Martin was you. Trayvon Martin did matter. And I just want New York to know that we're not going to stop until we get justice for Trayvon," his father said.
Trayvon's parents are meeting with the Florida Department of Justice on Thursday.
City commissioners voted "no confidence" in their police chief over the handling of the fatal shooting Wednesday night.
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