The father said theirs was more than a father-son relationship. They were “best friends,” but a Texas jury found the son betrayed a trust, even though he was never formally the asset manager of a multimillion-dollar fortune.

The Thirteenth District Court of Appeals on Thursday affirmed a Travis County district court’s jury verdict and the court’s final judgment in Ahlgren III v. Ahlgren Jr., stating the evidence supported a finding that an express or informal trust existed and was breached.