[azhenfud]

Maybe he felt a duty to the child, regardless of the other circumstances?

You know, a commitment is a commitment, whether to a spouse or to a child, and sometimes being a direct blood descendant is irrelevant.

[MortMan]

Maybe he felt a duty to the child, regardless of the other circumstances?

Evidently he is the victim of a default judgment - entered because he was not present in the court room. Once he was there, he challenged paternity, ending with the support being dismissed. But, because the court entered a default judgment, he still owes back payments from before the paternity test.