New evidence discovered by the GBI could help authorities figure out what happened to a missing and presumed murdered college student from metro Atlanta.

GBI spokeswoman Sherri Lang was tightlipped Saturday about the evidence, which was found on Friday night on Cabero Road in Hawkinsville in Pulaski County. Robert Kane Rolison, the 17-year-old arrested Thursday in connection with the disappearance of Jmaal Malik Keyes, lives on Cabero Road in Hawkinsville. “But the evidence was not found at his residence,” said Lang. It will be submitted to the GBI state crime lab for testing.

Rolison has been charged with the murder of Keyes, 19, whose body has not been recovered. Authorities have not released a motive for the killing or said how they believed he died. He was last seen April 25 leaving his dormitory at Middle Georgia State College in Cochran. Officials from several key law enforcement agencies searched Friday afternoon for Keyes’ remains along the Ocmulgee River in Hawkinsville.

“The GBI and Middle Georgia State [College] police are still working the investigation,” Lang said Saturday. “We’re still following up on leads and we’re still looking for the body. The search for the body has not ended.”

Few details are known about the relationship between Keyes, who graduated from Hiram High School in Paulding County, and Rolison, who was dual-enrolled at a local high school and Middle Georgia State. The two are believed to have socialized on campus.