I have to disagree with everyone so far and be prepared for being bombarded with

Don't get me wrong, I think it is very, very tragic. Such a young life .
I spent my life on these tubes as we had a damn on our farm where we skied, and also the pont nearby. I also spent my life horseriding. Even if people are careful, accidents happen, which is why it is called an ACCIDENT. Unfortunately, like life, it is the luck of the draw. This was not a freak accident, it was an accident, and it is a shame that a 22 year old has been arrested for it. That could have been my brother driving that boat.
Still trying to figure out how the ski boat hit her, was the rope too short ? Did she get flung really far into the path of the boat ? Yes, if he was driving like an idiot and turned so sharply that the boat came very near to the kids, then he should be held accountable, but nothing like jail etc. Then two families lives have been ruined.
It happened to a school friend of ours, but unfortuntely it was her father that was driving the boat, his 10 year old son was ski-ing, and he turned sharply, and tragically, the propellar cut into his sons head and although he was airlifted to the hospital he died. This rocked our little community, but the father was not arrested. It was an accident. He has had to live with that for the rest of his life.
It is easier to die when horse riding than by being on these tubes.