There's been no request on the part of anyone for a DNA test. Both parties agree he is not the father, and have done so pre-dating any action by DCSE. Their story has been consistent and clear throughout. You need professional help with your "blame the victim" mentality.
This guy got hosed, pure and simple, by a bureaucrat paid for by tax dollars. You can't justify that, regardless of the amount of your words.
I am not blaming the baby. That's the only victim. You have two healthy people here. The mother is asking for welfare. The father is asking to be let off the financial hook.
The father and mother (who are the ones who got the ball rolling by getting married) can VOLUNTARILY enter any evidence they wish into court.
It's up to them ~ after all, they're the ones who are asking for the benefits and privileges.