Where can i get a pro bono lawyer

i filed contempt of court on my sons mother for refusal to follow court ordered visitation when it went to court neither side had a lawyer the mother maid false allegations of child molestation she had a psychiatrist speak on my sons behalf but i believe that there is a conflict of interest and the psych should not have been allowed due to the fact that she worked with the childs grandmother there was never a police report filed and the child was never examined at a hospital just the claim by the mother made at the contempt hearing and the psych's account like i stated the psych worked with the grandmother and the mother has lied to the courts and abused the system many times before she falsely accused her ex husband of the same charges and she falsely accused me of second degree assault o