Help amazing Dad keep his kids.

Hi, I am setting up this GoFundMe Page to try and help my brother. I know I am bias in this situation but seriously he is one of the best Dads I have ever seen. He has made his entire life about those girls. Unfortunately after over 10 years together the mother of his children decided she wanted something different out of life. So, she left, unfortunately that happens sometimes and unfortunately now after she has been gone for almost 2 years she has decided that he is unfit and she came and got the kids for a normal visit and decided not to bring them back. Now she filed for full custody and child support so now we are trying to get a lawyer so that she doesn't take the kids from their dad. She tried to get an exparte against him for her and the kids but the judge denied it because there is no reason she would need that and thankfully the judge saw that. My brother is an upstanding member in this community and has devoted his life to his kids and his family and for some reason she is trying to take that from him. If you can help out at all that would be so appreciated. I know everyone is going through something so Thank you so much for listening.