Investigators say he is a key suspect and more arrests may follow.

Ross was shot in Orleans Square in Savannah on Christmas Eve. She was walking with some friends after going to a cotillion downtown when a group of men tried to mug them, then shot Ross in the stomach. She died on New Year's Day.

Police have been chasing down dozens of leads, and today Chief Willie Lovett says he is proud of their hard work. 

"It was a diligent effort," he said. "The officers did a terrific job. Thanks to, in part, the community, with what tips that they gave and the information they provided for us, which enabled us to do this. But again, it was an effort between the community and the police."