Brown's family says he was on his way to the store when he was shot.
On Tuesday, officers held a traffic checkpoint on Poole Road to hand out flyers in hopes of getting any information about Brown death.
The father and stepfather's family was also at the check point. They are hoping police can make an arrest soon.
"Please help us," Brown's wife Angel Carapucci said. "Please come up if they know what they look like, names, where they stay at, what they look like, any little thing helps us out."
Police released surveillance video from a nearby business that shows three people running from the scene of the crime.
Investigators want anyone with information to give them a call.