Noah Enos was last seen at the King Gizzard and the Lizard Wizard concert, in the city's Goose Island neighborhood. His girlfriend said his phone died around 10 p.m., and he never made it home.
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Chicago police describe Enos as having brown eyes and black hair; 5-feet, 11-inches tall and weighing 140 pounds.
Anyone with information is asked to call Chicago police Area Five detectives at 312-746-6554.
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