Kyanna Thomas' family attended the vigil Tuesday night.
"I can't even explain the pain we're going through right now," her family said.
They tied to convey to the crowd the grief they now carry in their hearts.
They are hoping to move a community into action.
"The only thing I need the community to do is help me find my daughter's killer," said Anne Pressley-Thomas, Kyanna's mother.
Pressley-Thomas' daughter was killed early Sunday morning.
The 16-year-old had slipped out of her aunt's house in Brooklyn.
Someone stabbed the 16-year-old in the neck.
With life slipping away from her, she was able to call 911.
But sadly, by the time help made it to the corner of Saratoga Avenue and MacDougal Street it was too late.
Tuesday night at that corner, her father talked about the life his daughter lived.
"She was a sweet girl, she was good in math," Kyle Thomas, the victim's father said.
He's still learning how to live with her murder.
"I wasn't prepared for this at all," Thomas said, "I can't even imagine someone would do that to a young girl."