The employee tip jar was stolen from Grill-a-Burger on Tuesday afternoon.
The amount stolen has not been released but after nine students walked off the campus of Carver Learning Center shortly before, suspicions about their possible involvement were raised.
Grill-a Burger recently opened at 1205 N. Chadbourne St., downtown.
Police are investigating.
They suggest that tip jars not be left in easily accessible areas and to install security cameras.