Investigators say 17-year-old Huerta shot and killed himself while handcuffed in the back of a police cruiser at Durham Police Department headquarters back in November.
While investigators say Huerta was searched after he was arrested, they say he apparently had a .45 caliber pistol hidden somewhere on his person that the arresting officer did not find.
They're calling the death a suicide, and the Durham County District Attorney said earlier this month that he did not find probable cause to file any criminal charges in the case.
Huerta's family is pressing for more, and questioned why a friend arrested with Huerta said neither of them was armed.
After meeting with the family attorney and the SBI, prosecutors said Tuesday they have looked at the details in the anonymous tip and have agreed to "look into the material to the extent that it is reasonable and productive, and has a probability of relating to a crime."
The controversial case has led to multiple protests in Durham that have ended with violence and arrests.