A judge has ordered mental competency exams for three of five Michigan teens charged in the death of a man who was struck by a rock while traveling on Interstate 75.

The evaluations ordered Thursday will delay the case until Jan. 11. The five are charged with second-degree murder.

Ken White died when a rock thrown from an I-75 overpass on Oct. 18 in Genesee County crashed through a windshield and killed him. He was a passenger in a van.

A judge ordered mental evaluations for 18-year-old Kyle Anger, 16-year-old Mark Sekelsky and 15-year-old Trevor Gray.

Police said at least 20 rocks were found on I-75 in Vienna Township, 80 miles (130 kilometers) north of Detroit. Other cars were damaged.

â–ºMake it easy to keep up to date with more stories like this. Download the WZZM 13 app now.

Have a news tip? Email news@wzzm13.com, visit our Facebook page or Twitter.