This dad had another man take the DNA test he was suppsoe to take so he could avoid paying child support.
The women involved could not contact the man after she became pregnant. She had a legal paternity test served and when she saw the photo of the person tested it was not the man she claimed was the biological father of her child.
Read more here. http://www.yorkshireeveningpost.co.uk/news/latest-news/top-stories/despicable-dad-tried-to-fix-dna-paternity-test-1-5741486