Naperville, IL – A firefighter training exercise in Naperville unexpectedly uncovered a decades-old missing person case this week, forcing investigators to temporarily stall progress while awaiting new evidence.
According to Naperville Police, divers from the Naperville Fire Department were conducting a routine drill in Lake Osborne, located just south of the Naperville Public Safety Campus on Aurora Avenue, around 11 a.m. Thursday, Sept. 25, 2025. During the exercise, they discovered a submerged 1992 Nissan Maxima.
The vehicle, recovered later that afternoon, was traced back to a Berwyn Police Department investigation into the 2003 disappearance of Hiep Luu. Suspected human remains were found inside, though identification has not yet been confirmed. The DuPage County Coroner’s Office has taken charge of confirming the deceased’s identity.
Naperville Police divers returned to the lake Friday, Sept. 26, to continue searching for additional evidence. Officials said the discovery has effectively paused investigative progress until forensic testing and identification are complete.
The death investigation is being led by the Naperville Police Department in cooperation with Berwyn Police, who continue to oversee the original missing person case.
Anyone with information that may assist investigators is urged to contact the Naperville Police Investigations Division at (630) 420-4138 or the Berwyn Police Investigations Division at (708) 795-2160.
This article was produced by a journalist and may include AI-assisted input. All content is reviewed for accuracy and fairness.
Follow us on Instagram & Facebook for more relevant news stories and SUPPORT LOCAL INDEPENDENT NEWS! Have a tip? Message us!
