The surveillance footage shows a woman purchasing items at Castle Liquor, located on the corner of Allen Avenue and San Fernando Road, near the scene of the collision.
A store employee said the woman bought soda and lotto tickets.
Novar Ismailyan was struck at the intersection of Glenoaks Boulevard and Linden Avenue last Friday at about 7:20 p.m.
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The city of Glendale is offering a $50,000 reward for information leading to the arrest of the hit-and-run driver.
Anyone with information should call Crime Stoppers at (800) 222-TIPS, or (800) 222-8477.