may i try to offer my hand?

I was a child in this exact exact circumstance....my mother fled the state to get rid of him....and he was allowed to get away without paying us (it was back in the day...so you can imagine) and the child protection services talked about his rights this and his rights that...and my dad even got my moms father to testify against his own daughter...it was pretty ugly...and i was in the middle....
first of all...perhaps you could get letters from family...friends...that could agree that you were in the situation...my dad did that...and he got alot of head nods...and it didnt matter that it was a he said she said issue...it might be now...remember i was just a child but this is what i know...so..im trying....
also...perhaps any scars? And i hate to say this...but maybe your eldest daughter....im sure she was there...and she can say...yes he hurt her ...they will talk to the children...most definitly....give her alittle credit too...first of all remember that he is not her real father....so she wont feel she needs to love him no matter what because she is responsible that he is her real father (like i did mine) also remember alot of people mistake the understanding of responsible.....like the saying you are not the responsible one for the divorce...its more like...(this is my personal view on how i feel about my father) i am responsible for his actions because he is my father...like you are responsible for your daughter...its that kind of responsible...i need to protect the women he traps because i am his blood....and i need to isolate him because he is a monster....so talk to her about that....explain to her he is an adult ...with his own actions....and he is fully aware that he is fully responsible...and no matter how many times she says...i know mom.....keep telling her you love her...and keep repeating that he is responsible for his own actions and that he is an adult...not a child....trust her not to fall into the trap of gifts and stuff....yea there may be a denial phase....and sometimes denial never fully goes away....however....i can sit here and tell you honestly...my dad tells me he doesnt drink...and is working....and as much as i am in denial that he is lieing...i know he is wrong....and i have to continue to check myself on that....i can go on and on and on...about emotional issues...and possibly some ideas that get people to believe you..but im not a lawyer...and im guessing you have one? If not get one....but i gaurentee that if your children say...please dont make me go back to them...something will happen in favor of you and the children....i was too young at the time...like 4 so....i was forced to visit the summer until i was 12 and then i had complete control if i wanted to see him or not...but pm me if you ever need to talk....i am here for you and i will try to help in any way i can...i promise....
love and good wishes, inny