This reminds me so much of Kiely Rodni, with people so completely desperate to believe in some sort of grand conspiracy (in which an extremely tall adult male, whose cell phone and watch simultaneously go dead at the same time while he is very near to water and very drunk, was somehow ... stopped by an unknown assailant, forced to immediately turn off his phone and watch, taken somewhere, assaulted and killed in some fashion that did not show up on autopsy, stripped of his pants and boots, and then thrown back into the river -- with his shirt and watch but not his pants or boots or phone -- at the exact spot where he was abducted, such that he was found precisely where the data suggested he would be had he just drunkenly fallen in). In Kiely's case, even after watching her car drive into the reservoir, people were still somehow convinced that she'd been murdered, shoved in the back, and then driven into the reservoir by someone who then was magically beamed up out of the reservoir, leaving no trace.
I have a stepson Riley's age and a daughter Kiely's age. I cannot imagine the devastation of losing them. But tragic accidents happen all the time, and it does no one any favors to pretend otherwise.
P.S. As to whether Riley, called an avid outdoorsman, could swim ... my friend who drowned in the Mississippi River was an Eagle Scout and a trained lifeguard. Neither is any match against the mighty Mississippi.