The students were lined up against a wall, asked to kneel down and were subsequently
shot in the head execution-style.
All of the victims were enrolled, or in the process of enrolling at Delaware State University.
31-year-old Joseph Carranza surrendered earlier this afternoon with his lawyer present.
The 15-year-old boy, who was brought into custody at around 11 p.m. on Wednesday, is not being identified because of his age.
The prosecution is looking at trying him as an adult.
Mayor Cory A. Booker has said that other suspects are being looked for. "We have very, very strong leads," he said. "I want the killers off the streets of Newark."
Information from lone survivor Natasha Aeriel, ballistics evidence and a fingerprint have led to a major break in the case according to
CNN.com.
Robbery is believed to be the motive of the crime, but authorities are also looking at possible gang involvement.
There is a $150,000 reward for any information regarding the case.
