Bio dad want to challenge... cont.'d

[Kane]

I don't think bio dad ever got an answer, so I'm not sure why the thread was closed.

This, I think is the answer:

§ 160.609. TIME LIMITATION: CHILD HAVING ACKNOWLEDGED
OR ADJUDICATED FATHER. (a) If a child has an acknowledged father,
a signatory to the acknowledgment or denial of paternity may
commence a proceeding seeking to rescind the acknowledgment or
denial or to challenge the paternity of the child only within the
time allowed under Section 160.307 or 160.308.
(b) If a child has an acknowledged father or an adjudicated
father, an individual, other than the child, who is not a signatory
to the acknowledgment or a party to the adjudication and who seeks
an adjudication of paternity of the child must commence a
proceeding not later than the fourth anniversary of the effective
date of the acknowledgment or adjudication.

Added by Acts 2001, 77th Leg., ch. 821, § 1.01, eff. June 14,
2001.

I think the answer is that the four years starts when the legal father was adjudicated - which was probably during the divorce, in 2002 (according to the original post).

Therefore, bio dad still has a chance to screw up the kid's life, if he hurries.