She looked toward the rear of the store and saw the masked man advancing toward her. He pointed the handgun directly at her and demanded the money from the register, the report states.
The man held out a bag for Guan to put money in, she told police. He seemed nervous and looked around the restaurant.
When the gunman saw the money in the bag, he told Guan he needed more and she returned to the register to empty more cash, the report states.
Afterward, the man ran back through the same back door where he entered.
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