Billboards ask for tips after rock kills car passenger on I-75

- Billboards are being used to encourage tips from the public after authorities in Genesee County say a rock thrown from a highway overpass smashed a car's windshield and killed a passenger.

Authorities say 32-year-old Kenneth White of Mount Morris was riding in the car Wednesday night in Genesee County's Vienna Township when he was hit. The car was traveling southbound on I-75.

Four other vehicles were struck with large rocks or concrete chunks. Investigators say they believe rocks may have been taken from another location and thrown off the overpass. The sheriff's office says a group of people may be responsible.

Crime Stoppers of Flint and Genesee County is encouraging anyone with information to come forward. A $2,500 reward is being offered.

Man hit, killed by rock thrown from I-75 overpass in Vienna Township

White's death is being investigated as a homicide. If you'd like to make a donation to help Kenneth's family pay for his funeral expenses, you can do so via their GoFundMe account here.

Vienna Township is about 80 miles north of Detroit.

This is a developing story. Stay with FOX 2 for updates.

UPDATE: The Genesee County Sheriff's Office says a group of teens is in custody in connection with the man's death. Continue reading more here... 

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