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Authorities in Illinois have determined the cause of death for a couple who tragically passed away just days before celebrating their wedding anniversary.

Harvard, Illinois police reported discovering the couple on October 6, when an officer noticed a vehicle with its hazard lights flashing. Upon inspection, the officer found both occupants deceased inside the car.

According to a spokesperson from the McHenry County Coroner’s Office, the deceased were identified as Rachel Dumovich, 29, and Brandon Dumovich, 30, residents of Sharon, Wisconsin, as reported by Fox News Digital.

Rachel and Brandon Dumovich were found deceased less than a week before they were to commemorate their wedding anniversary. (Facebook/Rachel Dumovich)

The spokesman for the coroner’s office told Fox News Digital that preliminary findings show both Rachel and Brandon had died from gunshot wounds to the head. Harvard Police Chief Tyson Bauman previously told Fox News Digital that an investigation is ongoing, adding: “While a murder-suicide is a potential scenario, no final determination has been made.”

Full results from an autopsy conducted by the coroner’s office haven’t yet been released.

Police initially said both people had gunshot wounds, adding a gun was found inside the car. The McHenry County Major Investigative Assistance Team was activated for the incident.

While police told nearby residents to shelter in place after finding the dead couple, it was “later determined there was no ongoing threat to the community.”

According to her obituary, Rachel Noel Dumovich, 29, was described by loved ones as a loyal friend who loved cooking, fashion, decorating and spending time by the water. (DeFiore Funeral Home)

A wedding page on The Knot made by Rachel described the couple as “middle school sweethearts.”

Rachel described that she met Brandon in middle school when she was 12 years old and caught his attention by “stealing cologne from his locker and running away with it.”

The two stayed in “touch through many life stages and 15 years of friendship,” Rachel wrote, sharing that they began dating in 2022.

Rachel Dumovich, 29, and Brandon Dumovich, 30, got married in October 2024. (The Knot/Rachel Dumovich)

Brandon proposed in the summer of 2023 at Big Cedar Lake near Slinger, Wisconsin, where the pair got married on Oct. 12, 2024.

“We can’t wait to share the next chapter of our love story surrounded by our friends and family!” Rachel wrote in announcing the wedding.

Rachel Dumovich and Brandon Dumovich met in middle school. (Facebook/Rachel Dumovich)

Hours before her death, Rachel posted on Facebook: “Forever chasing sunsets. Wishing we were back in Greece.” The post appeared to reference the couple’s honeymoon.

People with any information are asked to contact the Harvard Police Department at (815) 943-4431 or provide information anonymously through the Crime Stoppers hotline at (815) 943-4343 or email crimestoppers@cityofharvard.org.

Fox News Digital’s Sarah Rumpf-Whitten contributed to the report.