PretiP, first off, welcome to this compassionate site. I'm sure many others will jump in with their comments as well.
Maybe you need to also speak to their doctor and explain your fears to him, telling him that if he releases them and something happens you will hold him personally responsible. As for you constant thinking of this problem, understand that no matter how much you worry and fret, what is destined to happen will happen, only the good Lord knows whats in store for any of us, so relax, its in his capable hands.
I would suggest if you and I were closer that you accompany me to see THE BUCKET movie with Jack Nickolson and Morgan Freeman. It will make you laugh and forget everything, at least for a little while. Remember you have to take care of you too or you will be no use to anyone.
HUGS, now go see the movie...