From the Illinois State Police Twitter page:

llinois State Police mourn the loss of Trooper Brooke Jones-Story #5966. She was struck by a truck tractor semi trailer while outside of her squad car on a traffic stop on US Route 20 near Freeport, IL. Rest peacefully. We will never forget you. End of Watch 3-28-19

llinois State Police Trooper Brooke Jones-Story #5966

lllinois State Police Trooper Brooke Jones-Story #5966

From the Illinois State Police Facebook page:

ILLINOIS STATE POLICE MOURN THE LOSS OF
TROOPER BROOKE JONES-STORY

PECATONICA, IL – Illinois State Police (ISP) Acting Director Brendan F. Kelly regretfully announces the line-of-duty death of ISP District 16 (Pecatonica) Trooper Brooke Jones-Story.
This afternoon, March 28, 2019, at approximately 11:24 a.m., Trooper Brooke Jones-Story, #5966, was inspecting a commercial motor vehicle on United States Route 20 westbound, just west of Illinois Route 75 in Stephenson County. At approximately 12:20 p.m., Trooper Jones-Story was outside her squad car when she was struck and fatally wounded when a truck tractor semi-trailer combination struck her squad car and the semi Trooper Jones-Story was inspecting.
“Today is a dark day for the Illinois State Police family. This is the six-year anniversary of the death of another Trooper, and now another brave soul, Trooper Brooke Jones-Story, has made the ultimate sacrifice for people of this state. At this very moment, the men and women of the ISP are responding and focused on the job and mission, because that’s what Trooper Jones-Story would do,” stated Acting Director Kelly.

Trooper Jones-Story was a 12-year veteran of the Illinois State Police District 16 in Pecatonica.
Additional information will be released once it becomes available.

Trooper Brooke Jones-Story