Adam Grunin, of Wheeling, was allegedly going about 107 mph and fleeing the scene of another traffic crash when his 2017 Hyundai Sonata hit a Chevrolet Equinox with four members of the Lendino family, according to Wheeling police.
Alyssa Lendino, 16, was killed in the crash. She was a student at Hersey High School in Arlington Heights.
Her parents sustained severe injuries.
Grunin appeared in court Wednesday in Rolling Meadows. A judge ordered him held in lieu of $300,000 bail. His parents said that they were prepared to post the 10 percent needed for him to be released.
His next court date is Aug. 16.
The incident happened at about 2 p.m. Saturday in the intersection of Milwaukee Avenue and Hintz Road. Just prior, Grunin allegedly was involved in a "minor property damage traffic crash" in the 400-block of South Milwaukee Avenue. When he was fleeing the first crash, he rear-ended the Equinox, forcing it into the intersection where it was struck by a Toyota Tundra that was turning left from eastbound Hintz Road to northbound Milwaukee Avenue, police said.
A total of seven people were hospitalized as a result of the crash.
Gunin's attorney said that he had epilepsy and diabetes, however, investigators said there was no evidence that he suffered a seizure when the crash happened.
Drugs and alcohol tests were negative and there is no indication that Grunin was on his cellphone.
The prosecutor said that Grunin was driving straight and did not brake prior to the crash.