KANSAS CITY, Mo. (AP) — A Kansas lawmaker whose 10-year-old son was killed on the world’s tallest waterslide is thanking supporters and hoping such a tragedy never happens again.

Scott Schwab says in a statement supplied by his lawyer to the Kansas City Star that “words will never convey the appreciation” his family has for the outpouring since Caleb Schwab died Aug. 7 while riding the 168-foot tall “Verruckt” ride at the Schlitterbahn Waterpark in Kansas City, Kansas.

Scott Schwab says the family hopes the investigation provides “answers and assurances that such a tragedy would not strike again.”

As a partner in the law firm hired by the Schwabs, Michael Rader says Schlitterbahn has cooperated with his independent investigation.