Maria Garcia, 30, was booked into West Valley Detention Center in Rancho Cucamonga on suspicion robbery, according to booking records.
Garcia walked into the Sav A Minit market at 17640 Arrow Route, demanded money from an employee and threatened to hit her a rock if she didn't comply, police said.
The victim gave her money from the register. Garcia ran out of the business, but was captured by police.
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