Scott Larson was charged with reckless homicide and appeared in a Cook County courthouse for a bond hearing on Tuesday. His bail was set at $250,000.
RELATED: Trooper killed in I-294 crash in Northbrook
At about 4:30 p.m. Jan. 12, Lambert, 34, was driving home from a shift when he pulled over to assist at the scene of three-vehicle crash near Willow Road, state police said. While working at the crash scene, he was struck by a passing vehicle.
A drug test revealed signs of cannabis in Larson's system. Authorities say he admitted to vaping.
RELATED: Illinois State Police mourn trooper fatally struck on I-294 in Northbrook
This weekend, Larson was arrested in Kenosha, Wisconsin on a warrant charging him in the trooper's death. He was extradited back to Illinois.
Larson had been convicted of felony reckless driving and DUI in Wisconsin five years ago.
The Sun-Times Media Wire contributed to this report.