1 child seriously hurt the other child?

[appledoesntfallfar]

not too sure what to do in this situation. Oldest child (16) pushed youngest child (9) down the stairs and pretended he tripped, I am the only one that currently knows he didn't trip. They don't know I know but it's a long story and we have cameras near the stairs due to a break in from that window (there is a wall outside it).

How on earth do you move forward from this?

My 4 yo pushed my 3 yo down the stairs and I read her the riot act. Thankfully DS2 wasn't hurt, and DD fully understands never, ever to do it again.
A 16 yo pushing a 9 yo down the stairs? That's brutal.

TurquoiseChevrotain That is a really good point. I apologise for assuming that. My advice applies whatever gender your eldest DC is.