Unhappy robber: Gunman calls restaurant to gripe

"Next time there better be more than $586," he said during one call. He made "a similar threat" in the second call, police said.

About 11:15 p.m., a man wearing a ski mask and holding a gun walked up to the drive-through window at the Wendy's at 1940 Piedmont Road, police said. He told an employee to put the cash drawer on the counter.

After grabbing the drawer and running away, the robber discarded the drawer in the bushes at the nearby InTown Suites. Police dusted the drawer for fingerprints. However, the robber was seen wearing yellow gloves at Wendy's.

Police also are checking to see if the robber shows up on hotel security cameras.