Ok, I actually have experience through this.
First thing, how old was the child when this supposedly happen - looking at his post by you it looks like this went on his report in 1999, then is says further down that he owed 6026 in 11/2006, which looks like it went up since 11/2006 to last report of 12/2007 - figuring up 265 per month, it looks like he is about 28 months past due. This could have been child support that was due prior to the adoption.
First, he needs to contact social service and see exactly what months of child support is due. LEGALLY, if he is still the father of the child,then it looks as though he would owe about 3180 every year in child support, so if this is from a long time ago, he would owe a lot more than 7666.
If your friend gave the child up for adoption there will be no open court records. ALL ADOPTIONS ARE SEALED BY THE COURT, so if he has no paperwork of the adoption, going to the court house will not help him. (my children are adopted by my present husband and I cannot get any papers regarding there adoption because they are sealed).
If the child was adopted and this was money owed prior to the adoption, then he is no longer legally responsible for this money. He will need to provide this information to the social services office.
He can, however, go to the office of Vital statistics and try to get a birth certificate on the child by providing his identity. If the child was legally adopted then the original birth certificate is sealed and cannot be obtained, and the child's adopted fahter will be listed as the father, so therefore, there will be no record of his name on the birth certificate. So, if he is unsure as to whether the child was legally adopted or not, this is a way he can find out.
I doubt he has the child's social security number and so going to the social security office is not really going to help unless he has the child's birth certificate with him.
My children were adopted by my present husband in 2001. My ex-husband was about 10,000 behind in child support. When he signed over his rights and my husband did the adoption, all past due money was then void and he was no longer responsible to pay this amount.