Nevada State Police said the single-vehicle crash shut down traffic in both directions while crews responded near Jean.
Officers say the shooting appears isolated, and investigators are still working to determine what led up to it.
No injuries were immediately reported after the late-night crash, and state police determined alcohol was a contributing factor.
Michigan State Police say the Good Samaritan died at the scene after another driver tried to avoid a disabled vehicle blocking lanes.
A passing motorist stopped to help after an earlier crash blocked lanes near 9 Mile Road, then was hit by another driver and died at the scene.
Michigan State Police say the man crossed the freeway to help after an earlier crash blocked lanes on M-10.
Police say the suspect drove the teen across state lines after contacting her on social media.
A woman died at the scene after her Subaru drifted, overcorrected and struck two vehicles on Thursday afternoon.
Officers say the driver stayed at the scene and did not show signs of impairment as investigators examine the southwest Las Vegas collision.
Emilio was killed in August when a driver struck him without headlights and left the scene near a neighborhood crosswalk.
