Test results show drugs and alcohol were not factors in the crash that killed four northern Illinois teens earlier this month.
The Wilmington High School students died March 11 when their vehicle skidded off a rural road, smashed through a guard rail on a bridge and landed upside down in a creek.
Autopsies performed the next day showed all four drowned. They were identified as Cheyenne Fender, 17; Cody Carter, 15; Mathew Bailey 14; and Michaela Sembach, 15.
Will County Coroner Patrick O'Neil says toxicology results came back negative Monday for drugs or alcohol and the deaths have been ruled accidental drownings.
Authorities have said the driver likely lost control after hitting a patch of water or ice.