The driver of a car that barreled through a building used for a popular after-school camp in central Illinois, killing three children and a teenager, was not under the influence of drugs or alcohol and may have had a medical emergency,

A driver who was killed in a car versus semi-truck crash in Montgomery, Illinois, this week has been identified. Montgomery police said around 5:17 p.m., officers and the Oswego Fire Department responded to the crash involving the truck and a black Nissan sedan on Route 31 and Caterpillar Drive.

Investigators late Thursday were still looking into what caused the crash through an afterschool program building in Chatham, Illinois, which left four girls dead. Sabrina Franza reports.