Trying To Find My Sons Father

I Am Trying To Find My Sons Father. It Appears That He Disappeared. We Had A Court Date 3 Weeks Ago And He Didn't Show Up. The Judge Put A Warrant Out For His Arrest But When The Cops Went To His House They Said That He Didn't Live There Anymore And That I Would Have To Find Him Myself. I Have His Old Address, His Social Security Number And I Believe He Is In Bronx Ny. Could Someone Help Me. All I Want Is My Child Support. This Has Been Going On For The Past Three Years. Help Please......