I remember the exact same thing happened in Minnesota. Teens through cement blocks off a bridge and killed a dad and they were tried as juveniles.
In probably record time, chain-link fencing when out, more horizontal than vertical, on all the overpasses, to catch weighty objects that couldn't be thrown all that far.
Seem to recall that one and yes have noticed the courts are being more harsh. Don’t remember how old the kids were in that case but here at least one was 18 and the other 17 that is way old enough to know better.
What was that 18 year old thinking?