Custody Battle Rant

So my friend is in a bad horrible custody battle with his ex. She is accusing him of being cruel to the kids. Sad part is he has never raised his voice to anyone. He is so nice and really doesn't deserve this. He also has recorded conversations of her calling their kids ugly and stupid not once but multiple recordings. He has finally been able to see them after 2 months. Judge dismissed the endangerment to a child and is now looking into the custody part. I really hope he gets full custody cuz I've even witnessed how mean she is to the girls. The smallest one is dislexic and has a hard time reading but she tries and i heard her call her retarded. It broke my heart i don't understand how someone can b mean and thoughtless like that. (BTW I'M FRIENDS WITH HIM NOT HER)