Texas mistaken paternity: Can DNA prove you are not the father?

Article here. Excerpt:

'Imagine the pain of discovering you may not really be the father of a child you thought was yours and for whom you are legally the parent. In Texas, the law provides a way for such a man to learn the truth through the court system and set things right.

The Texas court proceeding is one for "mistaken paternity," sometimes called "paternity fraud." The only person with the right to bring a mistaken paternity action is a legal father who is questioning his parentage when no DNA testing was ever done. This law addresses the particular situation when a man mistakenly believes he is the father of a child because he relied on "misrepresentations," and thereafter either legally acknowledged paternity or was adjudicated to be the father.'