A child was born in 1981, I denied that I was the father of this child. There was and still is no proof in regards to the child being mine. I was never served with any court ordered child support. It is now twenty years later and the child(young man) is back in my life. I would now like to prove weather or not he is my son. I would like to take a DNA test to know for sure, and if he is my child can I be held responsible for 18 years of child support.