KANSAS CITY, Mo. (AP) – A Kansas lawmaker whose 10-year-old son was killed on the world’s tallest waterslide thanked supporters Tuesday, joining two others who were in the ill-fated raft in hoping that unfolding investigations prevent any such tragedy from happening again.

Scott Schwab, in a statement released by the family’s lawyer, said “words will never convey the appreciation” the Schwabs have for the public outpouring since Caleb Schwab died Aug. 7 on the 168-foot tall “Verruckt” ride at the Schlitterbahn Waterpark in Kansas City, Kansas.

“‘Thank You’ seems so inadequate to express our appreciation, but it is the only phrase we have. So, from the depths of our hearts, we thank you,” Schwab, a Republican from Olathe, Kansas, said in the statement, first reported by the Kansas City Star.

“While we try to step forward into the new normal of life without Caleb in our presence, we find hope with the current investigation into the incident to provide answers and assurances that such tragedy will not strike again.”

Michael Rader, a partner in the law firm hired by the Schwabs, said Schlitterbahn has cooperated with his independent investigation of the tragedy that also injured the raft’s two other occupants – Hannah Barnes, 32, and Matraca Baetz, 25.

“I can say that my firm and I along with our team of experts are doing everything in our power to ensure that all questions surrounding the cause of this tragedy are fully answered,” Rader wrote.

Cameron Morgan, a police spokesman, said earlier Tuesday that it’s unclear when the investigation will be completed and any findings released.

Barnes and Baetz issued a separate statement through their attorney.

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