Three of five Michigan teens have been found competent to stand trial in the death of a man killed after a rock thrown from a freeway overpass crashed through a van's windshield.

Genesee County Prosecutor David Leyton says the evaluations show Kyle Anger, Mark Sekelsky and Trevor Gray were mentally competent at the time of the incident and can understand their charges.

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Their lawyers requested the exams. Attorneys for Alexzander Miller and Mikadyn Payne did not. All five are charged as adults with second-degree murder and other charges.

They ranged in age from 15 to 17 when a when a 6-pound rock thrown Oct. 18 onto Interstate 75 in Vienna Township, north of Detroit, struck the van Kenneth White was in. White later died.

Probable cause conferences are Thursday.