Are there any free lawyers in Chicago that can help my friend?

My friend is a single mother of 4 children and is barely paying her rent and other bills. She is a good mother that loves her children. Recently she went to court to get child support from the father of her youngest (a girl of 3 years old). She won the case but as a result the father is now attempting custody of the child because he does not want to pay child support. She can not afford a lawyer in any way. Any advice will be appreciated. Thank you.