Sad For My Twin/ Helpless
Lean into this (as you may be projecting these beliefs onto your twin):
Why do you feel the need to hold them accountable, where does this come from?
ie. it could be something you learned, where we are brothers keeper and if you don't hold them accountable who will.
What to do with it now?
I recommend some work through the trigger exercises to release any responsibility for the karmic's actions. By wanting to hold them accountable, you hold onto their energy and carry the burden.