A grieving Arkansas woman believes a malfunction in her family’s aircraft weather-tracking system may have contributed to the tragic plane crash that claimed the lives of her father and brother as they returned home from a baseball game.

Jimmy Don Lewis, 48, and his 22-year-old son, Brayden Ty Lewis, were killed late Thursday when their Beechcraft Baron 55 crashed in rural Monroe County, Illinois. The pair had departed from St. Louis Regional Airport after attending a St. Louis Cardinals game and were flying back to Siloam Springs, Arkansas.

According to Jimmy’s daughter and Brayden’s sister, Kelsey Lewis, the aircraft’s weather-tracking software was reportedly 30 minutes behind real-time conditions. She believes the outdated information led her father to think there was still a safe gap between approaching storm cells.

“My dad, when it came to flying, he was very, very cautious,” Kelsey said, adding that he would never have intentionally flown into dangerous weather if he had known the true conditions.

Investigators say preliminary flight data indicates the aircraft began turning—possibly in an attempt to avoid severe weather—before entering what authorities described as a “descending spiral.” Radar contact was lost shortly afterward, and search crews located the wreckage the following morning near Columbia Quarry in Illinois. Both men were pronounced dead at the scene.

The Federal Aviation Administration (FAA) and the National Transportation Safety Board (NTSB) are investigating the crash. Officials have not determined the official cause, and Kelsey’s comments about the weather-tracking system remain a family account rather than a confirmed finding by investigators.

Family members described Jimmy and Brayden as inseparable, sharing a passion for aviation and earning their pilot licenses together. In their memory, the Lewis family plans to establish the Lewis Memorial Sports Scholarship at Kansas High School to honor their legacy of generosity and community service.