(b) Under the provisions of this subsection, any person may petition the court to intervene as a party in interest at any time as provided by supreme court rule.
2. Case Law Involving Individual Who Acted As Father For Child, But Turned Out Not To Be Biological Father:
In re T.Q.L., 386 S.W.3d 135 (Mo. 2012): “Petitioner’s third amended petition was sufficient to meet the requirements of section 452.375.5(5)(a) because it alleged the unfitness of Child’s biological parents and that awarding Petitioner custody of Child would be in Child’s best interest. In addition to Petitioner’s sufficient allegations of Mother’s and the unknown father’s unfitness, his petition to transfer custody survives a motion to dismiss because he alleges facts that the “welfare of 452.372.5(5)(a). This Court does not weigh the credibility and persuasiveness of the facts Petitioner alleged in his petition but acknowledges that those facts meet the elements of section 452.375.5(5)(a), and for that reason, the petition will be reinstated.”
To gain more information about third party custody, you can read our pages on third party custody, child custody and grandparent visitation rights.