Oh Jesus  
all our worst fears, right there.

i am so so sorry you are going through these and that your fallout journey has ended in this, the most ultimate of ways.

you are a very brave, strong and incredibly lady dealing with this for you and your children and posting here too.

if there is any comfort at all to be had here, it is in the knowledge that now your husband is no longer tormented by his demons.  
That doesn't help your or your children I know, as I'm sure you would all prefer him here with you and that you will feel his loss so keenly and for some considerable time to come.  He can no longer harm himself or you, or your family.  Let him have his peace and you and your children try and find your own peace in time, remember the good times and celebrate those.

you have my absolute heartfelt sympathy and will be in my thoughts.  Don't leave us if you need support. We will be here.

lots of love, peace and hugs

xx