Dibbern v. Dibbern — Nebraska appellate court affirms modification from joint to sole custody based on father’s alcohol relapse, parenting failures, and pattern of harassment

Case
Keyona Dibbern, now known as Keyona Sanchez v. Daniel Dibbern
Court
Nebraska Court of Appeals
Judge
Moore (Mike Johanns, 2000)
Date Decided
April 28, 2026
Docket No.
A-25-468
Topics
Child custody modification, parental conduct, substance abuse, coparenting failure
Source
Read the full opinion

Background

Keyona and Daniel divorced in August 2023 under a consent decree awarding them joint legal and physical custody with alternating weekly parenting time for their two children, Conrad (age 7 at trial) and Caden (age 4). Daniel had completed an intensive inpatient alcohol rehabilitation program before the divorce, leading Keyona to agree to joint custody based on his apparent commitment to sobriety.

In February 2024, Keyona filed a modification complaint after Daniel relapsed into alcohol use, including a November 2023 DUI conviction. She alleged he was repeatedly late delivering Conrad to school, failed to take Caden to a doctor for a recurring rash, withheld Conrad’s prescribed glasses, and missed a dental appointment for Conrad. She also documented escalating patterns of vulgar, harassing text messages and aggressive in-person behavior at the children’s activities.

The trial court temporarily awarded Keyona sole custody in April 2024, then restored joint custody in July 2024 subject to Soberlink alcohol monitoring. The contempt and modification proceedings were tried together in February 2025. The district court ruled that a material change in circumstances had occurred and awarded Keyona sole legal and physical custody, finding joint custody was no longer in the children’s best interests. Daniel appealed.

The Court’s Holding

The Nebraska Court of Appeals affirmed, holding that the district court did not abuse its discretion in finding both a material change in circumstances and that modification served the children’s best interests. The court rejected Daniel’s argument that the evidence addressed only pre-decree issues or transitory conduct, noting that case law permits modification when there is an escalation in parental instability or negative behavior affecting children’s welfare, even if similar conduct existed before the original decree.

The court found substantial evidence of escalation: while Daniel had a history of using vulgar language toward Keyona prior to divorce, his post-decree communications escalated and became public harassment at children’s activities, reducing the children to tears. His pattern of failing to ensure school attendance (9 unexcused tardies and 5 absences during first grade alone), missing medical appointments, withholding prescribed medical treatment (glasses), and showing continued alcohol use problems despite Soberlink monitoring constituted a material change warranting modification.

On the best interests prong, the court emphasized that although both parents love their children, the fundamental foundation for joint custody—the ability to communicate and coparent civilly—had broken down irreparably. The court found that Keyona was better positioned to provide the stability and structure the children needed, including ensuring timely school attendance, completion of medical care, and completion of schoolwork, without the decision-making being derailed by parental conflict.

Key Takeaways

  • A material change in circumstances can be found based on escalation or intensification of parental behavior, even if the underlying conduct partially pre-dated the original custody order.
  • A parent’s pattern of harassment, vulgar communication, and aggressive in-person behavior toward the other parent—particularly when visible to or distressing the children—weighs significantly in custody modification analysis.
  • Failure to meet children’s educational needs (chronic tardies, absences) and medical needs (missed appointments, withheld prescribed treatment) provides grounds for modification when coupled with other material changes.
  • When joint custody requires effective coparenting communication and that ability is absent, courts may award sole custody to one parent to prevent decision-making from deteriorating into parental conflict.

Why It Matters

This case clarifies that custody modifications need not rest exclusively on new facts unknown at the time of the original decree. Instead, Nebraska courts will modify custody when the evidence shows an escalation in negative parental behavior or parenting failures that materially affect the children’s welfare—even when roots of the problem predate the original order. The opinion underscores that persistent inability or unwillingness to coparent civilly is itself a material change warranting modification, especially when combined with substantive failures in meeting children’s educational and medical needs.

For practitioners advising clients on modification strategy, the case demonstrates that documenting patterns of aggressive communication, missed appointments, and school performance issues—particularly when tied to one parent’s inability to manage responsibilities or control behavior during the other parent’s parenting time—provides a compelling pathway to modifying joint custody arrangements that have proven unworkable in practice.

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