On Sunday, the New York Times ran a feature about soaring mental illness in American teenagers. Between 2007 and 2018, suicide rates among people aged ten to 24 rose by 60 per cent. Between 2015 and 2019, prescriptions for antidepressants for teenagers rose 38 per cent. Between 2009 and 2019, emergency room visits for self-inflicted injuries among people aged ten to 19 doubled for both sexes; for girls, they more than doubled.
Sorry for your loss jourdain, but seemingly it isn't an isolated incident; something is going on & I think there may be some clues about this tragedy in your OP.