A man walked into the store, located in the 4300 Block of South Henderson Street, on July 7 and began milling around as if he was shopping, according to police.
Moments later a woman pulled up in an SUV and joined the man inside. Police say the man then "egged on other patrons and chased them from the establishment."
The man then picked up a can of tomato paste and threw it at the clerk. During the melee, the robber pushed the cash register to the ground and stole an envelope full of money, according to police.
The robber and his female friend then left the store, hopped in the woman's SUV and sped away.
Police searched the area but didn't find the duo. They did, however, find their (very poor quality) images on the store's surveillance camera.
Anyone with information about the pair is asked to call police at (206) 684-5540. A reward is being offered.