A 4-year-old boy was killed and his two brothers were hurt in a crash on I-55.
DUI charges are pending against their father.
The rollover crash occurred around 2 a.m. Sunday on I-55 in Bolingbrook.
State police said the car rolled and ejected 4-year-old Taylor Dyer who died from his injuries.
His 7-year-old and 2-year-old brothers are in critical condition at Advocate Lutheran General Hospital in Park Ridge.
They are are expected to survive.
Illinois State Police believe alcohol played a factor in the crash.
The father remains in the intensive care unit at Advocate Good Samaritan Hospital in Downers Grove.
State Police say charges will be filed once he is released from the hospital.
Neighbors say he was a great dad.
The investigation is ongoing.