Illinois State Police

The Illinois State Police have issued an “endangered missing person” alert after a 15-year-old girl disappeared under “suspicious circumstances” earlier this month.

An Illinois State trooper’s vehicle was struck by a drunk driver Sunday morning, while he was assisting with a traffic stop on Interstate 55 near west suburban Romeoville.

Illinois State Police say that a motorist has died after suffering a medical emergency while driving on the Edens Expressway Tuesday afternoon, with the driver veering off the roadway and crashing into a lagoon in suburban Northbrook.

A person was killed, and another person was seriously injured, in a crash on Interstate 57 near Calumet Park on the Far South Side, according to preliminary information from Illinois State police.

An innocent man is sharing his story after his car was slammed into by a carjacker who was on the run from police early Wednesday morning.

The northbound lanes of the Bishop Ford Expressway are closed Wednesday evening after reports of a shooting on the roadway.

Authorities were seen searching a Joliet canal Tuesday afternoon, the same canal where the sibling of missing Bolingbrook mother Stacy Peterson claimed her sister’s body had been found years ago, sources close to the investigation told NBC Chicago.

Authorities were seen searching a Joliet canal Tuesday afternoon, the same canal where the sibling of missing Bolingbrook mother Stacy Peterson claimed her sister’s body had been found years ago, sources close to the investigation told NBC Chicago.

An Illinois State Police master sergeant escaped injury early Saturday morning after a vehicle slammed into his patrol vehicle while he was pulled over on the side of the Jane Addams Memorial Tollway.

After a state trooper died by suicide Friday, mental health experts talked to NBC 5 about the pressure often felt behind the badge. Christian Farr reports.

The death of an Illinois state trooper who died following a shooting on the Dan Ryan Expressway in Chicago was ruled a suicide, the Cook County Medical Examiner’s Office said Saturday.

An investigation is underway after the body of a man was found floating in the Mississippi River south of St. Louis

Illinois State Police will increase patrols on Chicago-area expressways beginning Friday night in response to a surge in freeway shootings. NBC 5’s Lexi Sutter reports.

Illinois state troopers were mourning late Friday after one of their own died in a shooting on the Dan Ryan Expressway. NBC 5’s Vi Nguyen reports.

The mother of an Illinois state trooper who died in a shooting on the Dan Ryan Expressway spoke to reporters Friday, describing her son as a kind person who always wanted to protect others.

Officers from several law enforcement agencies gathered at the Cook County Medical Examiner’s Office Friday to mourn the loss of an Illinois state trooper who died from a self-inflicted gunshot wound. NBC 5’s Regina Waldroup reports.

An Illinois State Police trooper died Friday afternoon after sustaining a self-inflicted gunshot wound on the Dan Ryan Expressway. NBC 5’s Vi Nguyen reports.

Sky 5 footage shows the scene where an Illinois State Police trooper was shot Friday, according to authorities, on the Dan Ryan Expressway. Editor’s note: A portion of the video has been blurred because of graphic imagery.

An Illinois State Trooper who was shot Friday afternoon on the Dan Ryan Expressway in Chicago has died, according to the Cook County Medical Examiner’s Office.

The Chicago area has seen a total of 185 expressway shootings so far this year as of Thursday, according to Illinois State Police.