Chicago police said the unidentified male victim was driving a Hyundai sedan west in the 4000-block of West Peterson Avenue just after 3:15 a.m. when he lost control of the car. The vehicle had been traveling at a high rate of speed before it struck a tree, coming to stop on the sidewalk.
The male victim died on the scene, and the woman was taken to St. Francis Hospital in critical condition.
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A witness was burned while trying to help get the two out of the car.
The Major Accidents Unit is investigating. Street closures are in place in the area.