Vaughn, 30, was shot in the stomach and arm, and he died at University of Cincinnati Medical Center.
A judge issued Lattimore a $1 million bond Wednesday morning. He is being held at the Hamilton County Justice Center.
Anyone with information about the case should call the Criminal Investigation Section at 513-352-3542 or Crime Stoppers at 513-352-3040, or submit a tip at P3tips.com. Callers may remain anonymous and may receive compensation for their information.