It’s been chewed here, regurgitated, re-chewed, over and over.
I don’t know the details. Maybe you don’t either. Sometimes one limb has to be amputated to save a life. Sometimes one child must be thrown out to save the rest. It’s dinei nifashos, in earnest. I’ve heard of a principal who refused his morning meal, fasted the day he had to decide on expelling a girl from school – as do Sanhedrin on the day they decide on a capital crime.
Yes, it is a grave decision. Hanhalah must answer either way they proceed. Say this one stays and ends up corrupting the rest – a most grave consequence – actually worse than if only one ends up ?????? ???.
So yes, there are two sides to be looked upon, with grave, earnest importance and weight.