It's one of the more disturbing shootings in the city in recent memory.

A gun battle in the middle of hundreds of people in Brownsville.

One person was killed and 11 others wounded.

That was more than a month and a half ago, and the NYPD's Chief of Detectives Dermot Shea says unfortunately there's still no one arrested.

"We are making progress is what I can say," said Shea.

The shooting erupted on July 27 at an Old Timers Block Party, a huge annual reunion for the neighborhood. Apparently, an old beef between two guys, possibly gang related led to the gunfire.

Chief Shea still doesn’t want to share too many details about the investigation saying, “I do anticipate an arrest, but this is a complicated case and it may take time."

Law enforcement sources say the NYPD's crime stoppers hotline has received few tips although investigators have several people of interest they'd like to bring in.

But it appears some witnesses are afraid to testify. On the streets, the saying is snitches get stitches.

Chief Shea says all shootings are taken seriously,

"When you have an incident with multiple people, particularly in an incident like this that takes it to another level," said Shea.

Following the shooting Police Commissioner James O'Neill rushed to the NY1 news studio to discuss the brazen act of violence saying

"Not a good night in Brownsville," said O’Neill.

Elected officials, community leaders and police brass converged on the crime scene, a local playground, to denounce the shooting.

Federal law enforcement agencies and the U.S. Attorney's office have stepped in to help the NYPD with the case.

A $10,000 reward has been offered for information that leads to an arrest and indictment.

“I feel confident that we’ll come to a good closer on that case," said Shea.

There's just no timetable on when that will happen.