Calvin Riley, 20, from San Mateo, was playing the popular Pokémon Go game when he was shot and killed before 10 p.m. on August 6, 2016 at Aquatic Park near Ghirardelli Square.
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The sketches are of two people in the area at the time. The right photo below is the newest sketch.
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The first person was in a car and the second was recording video at the crime scene.
A $25,000 reward is being offered in the case.
Anyone with information about this case is asked to contact the FBI's San Francisco Field Office at (415) 553-7400.
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