ROGERS — The State Crime Lab ruled the Aug. 4 death of a 3-year-old Benton County boy an accident, according to a report from the Benton County Sheriff’s Office.

The report was obtained thought a Freedom of Information Act request to the Sheriff’s Office.

Crime Lab results show Lincoln Andrew Brunner died of “environmental hyperthermia,” according to the report.

Investigators said they will recommend no charges be filed in the incident in which the child climbed into a vehicle and died.

“Sometimes, horrible things happen to good people,” said Kenneth Paul, a Sheriff’s Office investigator. “This was one of those incidents.”

Paul’s report said the boy’s parents, Kary D. and Sandra Brunner, 13822 Rolling Hills Drive in Bentonville, noticed the boy was missing when it came time for the child’s nap.

The parents told Paul they heard their other children playing upstairs and assumed Lincoln was with them.

When Kary Brunner went upstairs, he couldn’t find Lincoln, according to the report. Both parents told investigators they thought Lincoln laid down somewhere to take a nap.

After searching the residence and being unable to find Lincoln, the parents searched a barn and the garage, according to investigators.

The father found the boy in the couple’s second vehicle, a “newer mode” Buick LeSabre, parked outside the garage, according to the report.

Kary Brunner told Paul the boy was sitting on the floorboard of the back seat. The father told investigators Lincoln was discolored, but the father thought it was because he had been playing in dirt.

The parents called 911 at 5:07 p.m. and attempted to give the child CPR with instructions from the dispatcher.

Paul said, the boy’s body temperature registered 105.2 with an external thermometer about one hour and 45 minutes after the 911 call.

The family told Paul they had lunch about 3 p.m., and that was the last time the child was seen until he was found in the vehicle.

The report said a place on the boy’s leg had what appeared to be third-degree burns, and decomposition had begun by the time he was found.

“It’s not uncommon for decomposition to occur quickly in warm weather,” Paul said. “The heat speeds up the process.”

The report also notes the vehicle in which the body was found was parked in direct sunlight and didn’t have tinted windows.

Paul said his report will be forwarded to Van Stone, county prosecutor, with a recommendation that no charges be filed.

Stone said the report hadn’t been received by his office as of Thursday afternoon. Paul had, however, kept him informed during the investigation and Stone said he doesn’t anticipate any charges. However, the report will be reviewed before a decision is made.