KANSAS CITY, Kan. — A 10-year-old boy was decapitated as he rode a 168-foot tall water slide at a water park in Kansas, a person familiar with the investigation said Wednesday.

The person spoke on condition of anonymity because the person is not authorized to speak about Caleb Schwab's death Sunday on the raft ride at the Schlitterbahn Waterpark.

Two women who are not family members were in the raft at the time with the boy and were treated for facial injuries. The boy's parents — Republican state Rep. Scott Schwab and his wife, Michele — have requested privacy and have not spoken publicly since the death.

Caleb's funeral is scheduled for Friday.

A spokeswoman for the park on Wednesday declined to discuss the circumstances of the boy's death. The Guinness World Records has certified the ride called “Verruckt” — or German for “insane” — as the tallest in the world.

The park reopened Wednesday except for the sprawling section that includes the water slide.

Verruckt riders sit in multi-person rafts that begin with a steep drop, followed by a surge up a second hill before a 50-foot descent to a finishing pool. Each Verruckt rider must be at least 54 inches tall, and the combined body weight of the riders on each raft is limited to 400 to 550 pounds.

Riders are harnessed in with two nylon straps — one that crosses the rider's lap, the other stretching diagonally like a car shoulder seat belt. Each strap is held in place by long Velcro-style straps, not by buckles. Riders also hang on to ropes inside the raft.

Pulling a cooler behind her, Sara Craig, 42, said she was looking forward to an afternoon of fun Wednesday with her 14-year-old son, Cale, and one of his 13-year-old friends.

But she said the visit came with a twinge of unease, given Sunday's tragedy. “I feel guilty having fun when a family is hurting so badly,” she said.

She said the family rode Verruckt twice in one day a couple of weeks ago. She remembered a video they were required to watch.

Craig said that during her first trip down the ride with her son and one of his friends, her shoulder restraint came off, something she opted not to report to park workers.

“I didn't think much about it,” she said. “You don't think you're gonna die.”

So they rode it again, only to see the restraint on her son's friend also come loose by the time it was over. She also said the ride's operators sent them down the slide even though their combined weight was 393 pounds — shy of the weight limits the park advertises as a requirement.

The water park passed a private inspection in June that included Verruckt, according to a document released by a Kansas state agency.

Kansas law requires rides to be inspected annually by the parks, and the state randomly audits the records. The last records audit for Schlitterbahn was June 2012.