The clerk filled the backpack with money, cigarettes and cigars, deputies said.
Using surveillance video that showed the “distinct backpack,” investigators were able to locate one of the alleged robbers about half a mile from the store.
The man was carrying a backpack exactly like the one used in the robbery and he was carrying a black handgun, deputies said.
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Luis Montanez, 18, admitted to being involved in the robbery and was arrested, investigators said.
The second suspect, Devyn Omar Rivera, 20, was located and arrested later in the day, deputies said.
Rivera was charged with armed robbery and violation of probation, and Montanez was charged with armed robbery and petit theft.
The cash and merchandise stolen during the robbery was recovered by deputies.