Lancaster police say the suspect pretended to be an employee before stealing an undisclosed amount in cash from a stand inside Central Market last month.
A witness provided the minimalist black-and-white drawing to officers. Police say while the sketch was cartoonish, it helped remind an investigator of a potential suspect.
A photo of the suspect was given to the witness, who made a positive identification.
Police are searching for 44-year-old Hung Phuoc Nguyen, who is facing two counts of theft.
A spokesman for the police department says that as of Friday afternoon, Nguyen still hadn't been arrested.
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