Famed architect Helmut Jahn died of multiple injuries: Kane County Coroner’s report

Questions still linger in the death of acclaimed architect Helmut Jahn in a bicycle crash in Campton Hills.

He died of multiple injuries consistent with a car striking a pedestrian, according to the preliminary findings of an autopsy conducted by the Kane County Coroner’s Office. Toxicology samples have been sent to a forensic lab for further analysis, according to the coroner’s office.

Jahn, who designed the James R. Thompson Center in Chicago, was killed on May 8 after he failed to stop at a stop sign at Burlington and Old Lafox roads and was hit by two vehicles going in opposite directions, according to the Campton Hills Police Department. He was 81.

He was riding his bicycle northbound on Old LaFox Road and the cars were driving in opposite directions on Burlington Road. It is not known why Jahn failed to stop at the intersection.

The crash occurred at approximately 3:29 p.m. and Jahn was pronounced dead at the scene at 3:47 p.m. He was 81.

Jahn was wearing a bicycle helmet at the time of the crash, Campton Hills Police Chief Steven Millar said.

“Our investigation is complete at this time,” Millar said Friday morning.

Along with the James R. Thompson Center, Jahn designed the futuristic looking United Airlines terminal at O’Hare International Airport in Chicago and worked on numerous other projects. His wife, Deborah Jahn, trains and breeds horses at Seven Oaks Farm near St. Charles.