Key Takeaways
Custody orders can be changed when circumstances materially change. Massachusetts courts may modify an existing custody judgment when there has been a material and substantial change in circumstances and the modification is necessary for the child’s best interests.
The child’s current circumstances matter most. In R.K. v. R.M., the Appeals Court upheld a change in physical custody after the trial judge made detailed findings concerning the child’s health, school attendance, emotional regulation, and care.
An out-of-state parent can receive physical custody. A parent already living outside Massachusetts is not automatically disqualified from receiving custody. Courts examine the reasons for the move, the parent’s connection to the new community, and the effect on the child.
Past misconduct does not necessarily decide the case. The father had previously moved the child to Colorado without telling the mother, but the court still evaluated the child’s present best interests based on the entire record.
Joint legal custody can include a tie-breaking mechanism. The court maintained joint legal custody while giving the father final decision-making authority after allowing the mother an opportunity for input.
Appellate courts generally defer to trial judges on disputed facts. Credibility determinations and the weighing of evidence receive substantial deference on appeal.
The decision is persuasive, not binding. R.K. v. R.M. is an unpublished Rule 23.0 decision and should not be treated as establishing a new universal custody rule. This opinion can be instructive and persuasive, but it does not control what happens in future cases.
What R.K. v. R.M. Means for Massachusetts Custody Modifications and Out-of-State Moves
A 2026 Massachusetts Appeals Court decision provides a useful look at how courts evaluate requests to change physical custody when one parent lives outside Massachusetts and the child’s circumstances have changed significantly.
In R.K. v. R.M., No. 24-P-1101, entered April 24, 2026, the Appeals Court affirmed a Probate and Family Court judgment awarding the father primary physical custody of the parties’ child in Colorado. The court also upheld an arrangement maintaining joint legal custody while giving the father final decision-making authority if the parents could not agree after the mother had an opportunity to provide input.
The case involved years of interstate custody litigation, changes in the parents’ living situations, serious concerns about the child’s emotional and educational well-being, and competing allegations about each parent’s conduct.
The decision is important for Massachusetts parents because it illustrates how custody modification cases are actually decided. The court does not simply ask which parent previously had custody or whether one parent has behaved badly in the past. The central questions remain whether circumstances have materially changed and what arrangement now serves the child’s best interests.
There is one important qualification. R.K. v. R.M. was issued as a summary decision under Massachusetts Appeals Court Rule 23.0. It may be cited for its persuasive value, but it is not binding precedent.
The Facts of R.K. v. R.M.
The parents had a child in 2012, and later divorced in Massachusetts in 2014. Under their original separation agreement, the mother had physical custody and the parents shared legal custody. The custody arrangement changed several times over the following years.
In 2017, the parents agreed that the father would temporarily have physical custody and that the child would live with him in Virginia. The parents continued to share legal custody.
The father, who was then serving in the military, was later deployed overseas. During that deployment, a Virginia court temporarily returned physical custody to the mother, and the child returned to Massachusetts in 2018. Virginia later entered a judgment granting the father physical custody, but jurisdictional issues followed. The mother ultimately filed a Massachusetts complaint for modification in 2019.
That same year, the father moved with the child from Virginia to Colorado. Although the mother had agreed that the child could temporarily live with the father while she obtained stable housing, the father did not tell her that he and the child had moved to Colorado.
When the Massachusetts Probate and Family Court later learned of the move, it concluded that the father had not made the appropriate request before relocating the child to Colorado. The court ordered the child returned to Massachusetts pending final resolution of the custody dispute. The child returned to the mother’s care at the end of 2020.
In 2021, the father filed a counterclaim seeking physical custody so that the child could live with him, his wife, and their other children in Colorado. A four-day trial followed in 2023.
What Did the Probate and Family Court Decide?
After trial, the Probate and Family Court concluded that circumstances had materially and substantially changed and that the child’s best interests would be served by living primarily with the father in Colorado. Because of those findings, the judge awarded the father primary physical custody.
The court maintained joint legal custody but addressed the parents’ longstanding difficulty making decisions together. The judgment provided that if the parents could not agree about educational, medical, religious, or extracurricular decisions, the father would have final say after giving the mother seventy-two hours to provide her input.
The mother appealed.
She challenged several aspects of the judgment, including whether the judge had properly found a material and substantial change in circumstances, whether moving the child to Colorado served the child’s best interests, and whether giving the father final say was inconsistent with joint legal custody.
What Did the Massachusetts Appeals Court Decide?
The Appeals Court affirmed the Probate and Family Court judgment. The court rejected the mother’s argument that the judge had failed to identify a material and substantial change in circumstances.
The trial judge had expressly identified numerous changes since the controlling 2017 custody judgment, including:
- the father’s move to Colorado;
- the father’s retirement from active military duty and transition to nondeployable employment;
- the mother’s housing instability; and
- significant changes involving the child’s emotional, mental, physical, and educational circumstances.
The Appeals Court also upheld the finding that living with the father in Colorado was in the child’s best interests.
Finally, the court upheld the legal custody arrangement. It concluded that giving the father final say after consultation did not make the mother’s joint legal custody meaningless because she retained the right to participate in major decisions affecting the child.
The corrected modification judgment was therefore affirmed in its entirety.
The Supreme Judicial Court later denied further appellate review.
The Massachusetts Law Behind the Decision
Massachusetts law does not permit courts to change an existing custody judgment simply because one parent would now prefer a different arrangement.
Under G.L. c. 208, § 28, a court may modify an earlier custody judgment when two requirements are satisfied. First, there must have been a material and substantial change in the circumstances of the parties. Second, the requested modification must be necessary in the best interests of the child.
Both requirements matter.
A change in a parent’s residence, employment, family structure, stability, or ability to meet a child’s needs may be relevant. Changes in the child’s health, education, emotional condition, or development can also be important. Once the threshold for modification is met, the court must decide what arrangement serves the child’s best interests. Massachusetts trial judges have considerable discretion in making that determination because they hear the witnesses, assess credibility, review the evidence, and evaluate the family’s circumstances as a whole.
That discretion is not unlimited, but an appellate court generally will not substitute its own view of disputed evidence merely because another outcome might also have been reasonable.
Custody Modification and an Out-of-State Parent
The case also involved an additional issue: the father was already living in Colorado. That required the court to consider more than a traditional custody modification.
Massachusetts appellate law addresses situations in which a parent who already lives outside the Commonwealth seeks physical custody and permission for the child to live with that parent. In E.K. v. S.C., the Appeals Court explained that courts should consider whether the out-of-state parent’s move was motivated by an effort to interfere with the other parent’s relationship with the child, whether there were legitimate reasons for the move, and whether the parent had become rooted in the new community.
Relevant considerations may include employment, housing, finances, family composition, and the social and emotional benefits of the parent’s circumstances. If the court finds a legitimate reason for the out-of-state parent’s move and that the parent is meaningfully rooted in the new community, the court then considers the effects on the parents and child as part of the overall best-interests analysis.
That framework became important in R.K. v. R.M.
Why the Court Reached This Result
The Appeals Court’s decision was driven heavily by the trial judge’s detailed factual findings about the child.
During the period when the child was living with the mother after returning to Massachusetts, the judge found significant problems involving the child’s medications, emotional regulation, school performance, and attendance. According to the trial court’s findings, the mother repeatedly failed to administer prescribed medication for the child’s ADHD, anxiety, and depression. The child experienced serious episodes of dysregulation, including hospitalizations and incidents at school. The judge also found that the child had forty-five absences during the 2022-2023 school year and was struggling academically.
Those findings were significant because they were not successfully challenged on appeal.
The trial judge contrasted those circumstances with the child’s experience in the father’s household. The judge found that the father and his wife had provided the child with the structure and support necessary for him to thrive. The Appeals Court concluded that these findings adequately supported the decision to transfer physical custody to the father.
The Father’s Earlier Conduct Did Not Control the Outcome
One of the more interesting aspects of the case is that the father’s conduct was not uniformly favorable.
He had previously moved the child to Colorado without telling the mother. The mother argued that this conduct and other behavior should weigh heavily against him. She also argued on appeal that the judge had not adequately considered evidence she characterized as coercive control, including the father’s move to Colorado without telling her and the resulting separation from the child. The trial judge did not ignore those facts.
Instead, the judge considered favorable and unfavorable evidence concerning both parents and ultimately concluded that the child’s current best interests favored placement with the father.
The Appeals Court emphasized that weighing conflicting evidence and assessing credibility are primarily functions of the trial judge. That distinction is important.
Custody decisions are not generally decided by identifying which parent has made more mistakes. Courts instead evaluate how the relevant conduct affects the child and determine what arrangement presently serves the child’s welfare.
Why the Move to Colorado Was Permitted
The Appeals Court also upheld the decision permitting the child to live with the father in Colorado. The trial judge found that the father’s reason for living in Colorado was not to interfere with the mother’s relationship with the child. The judge also found that the father had established roots in Colorado and that living there provided a real advantage to him.
Those findings were sufficient under the framework discussed in E.K. v. S.C.
The fact that the father had previously moved the child without properly notifying the mother did not automatically prevent the court from later approving Colorado as the child’s primary residence.
That may seem counterintuitive, but it reflects the forward-looking nature of custody law. A court may consider past conduct, including conduct involving interference with another parent. But the ultimate question remains what arrangement serves the child’s current best interests.
Can Parents Have Joint Legal Custody if One Parent Has Final Say?
Another notable part of R.K. v. R.M. concerns legal custody. The parents continued to share joint legal custody, meaning both remained involved in major decisions concerning the child. But because they had an extensive history of disagreement, the judge created a tie-breaking mechanism.
If they could not agree about education, medical care, religion, or extracurricular activities, the father could make the final decision after giving the mother seventy-two hours to provide input. The mother argued that this effectively converted the arrangement into sole legal custody.
The Appeals Court disagreed. It reasoned that the mother still retained the right to participate in major decisions and that the father could not simply make those decisions without involving her.
The decision therefore illustrates that joint legal custody can still exist even when one parent has limited tie-breaking authority in specified areas, so long as the other parent retains a meaningful opportunity to participate in those major decisions.
At the same time, because R.K. v. R.M. is an unpublished summary decision, it should not be read as establishing a broad new rule that one parent can routinely receive final authority while the parties retain joint legal custody.
What Is Important About R.K. v. R.M.?
The case does not create a new Massachusetts custody test. Its significance is more practical.
It illustrates how several established custody principles can operate together in a complicated interstate case.
First, the relevant comparison in this case was between the current circumstances and those existing when the 2017 custody judgment entered. The December 2020 temporary order did not reset that comparison point because it was not incorporated into a judgment.
Second, detailed evidence concerning the child’s actual welfare can outweigh arguments focused primarily on the parents’ past conduct toward one another.
Third, an out-of-state parent can receive custody when the court finds legitimate reasons for the parent’s residence, meaningful ties to that community, and an overall benefit to the child.
Fourth, courts may attempt to preserve both parents’ involvement in legal custody while creating a mechanism for resolving chronic decision-making deadlock.
These points make the case useful even though it is not binding precedent.
What R.K. v. R.M. Does Not Hold
Because the decision is highly fact-specific, it should not be read as establishing several broader propositions.
The case does not hold that a parent who moves a child without permission will later receive custody. It does not hold that an out-of-state parent has an advantage over the parent remaining in Massachusetts. It does not mean that medication disputes or school absences automatically justify changing custody. It does not establish that one parent should ordinarily receive final decision-making authority whenever parents disagree. It also does not eliminate the requirement that the court find both a material and substantial change in circumstances and that the requested modification is necessary to support the child’s best interests.
Finally, R.K. v. R.M. is not binding precedent. As a Rule 23.0 summary decision, it may be considered for its persuasive value but should not be treated as creating a universally applicable rule.
What This Decision Means for Massachusetts Parents
For parents considering a custody modification, the case highlights the importance of changes affecting the child rather than simply changes affecting the parents.
A court may consider many circumstances, including:
- changes in the child’s medical or mental health needs;
- school attendance and performance;
- stability in each household;
- a parent’s ability to follow treatment recommendations;
- changes in employment or military obligations;
- relocation to another state;
- family and community support; and
- the ability of each parent to meet the child’s day-to-day and long-term needs.
Evidence matters.
Medical records, school records, attendance records, treatment recommendations, communications between parents, prior judgments, and testimony from people familiar with the child can all become important depending on the issues in dispute.
The case also demonstrates why the label attached to a custody arrangement tells only part of the story.
Two parents may technically share legal custody while a court establishes a specific procedure for resolving disagreements.
How Could This Rule Apply in Another Case?
Consider parents who have shared a custody arrangement for several years.
The child begins experiencing significant academic and behavioral difficulties. School attendance deteriorates, medical recommendations are not consistently followed, and the child experiences repeated crises.
Meanwhile, the other parent has established a stable home in another state, has consistent employment, and can demonstrate that the child previously functioned well while living there.
Those facts would not automatically require a custody change.
But they could support a finding that circumstances have materially changed and require the court to determine whether a new custody arrangement would better serve the child.
Now change one fact.
Suppose the child is doing well in the current home, attending school consistently, receiving appropriate medical care, and maintaining strong relationships with both parents.
The fact that the other parent has a desirable home or employment opportunity elsewhere would not by itself establish that changing custody is necessary.
Custody modification remains a fact-intensive inquiry focused on the individual child.
Does R.K. v. R.M. Affect Your Massachusetts Custody Case?
Possibly, particularly if your case involves an existing custody judgment, significant changes in a child’s circumstances, or a parent who already lives outside Massachusetts.
The decision may also be relevant where parents share legal custody but have become unable to make important decisions together.
However, the outcome in R.K. v. R.M. depended heavily on detailed factual findings made after that case’s four-day trial. Another family with different medical, educational, parenting, relocation, or household circumstances could receive a very different result.
The case is therefore best understood as an illustration of how Massachusetts custody law can operate, rather than a prediction of how another case will be decided.
Frequently Asked Questions About Massachusetts Custody Modifications
What must I prove to modify a Massachusetts custody order?
A court generally must find that there has been a material and substantial change in circumstances and that modifying the existing custody arrangement is necessary in the child’s best interests. The relevant changes can involve the parents, the child, or both.
Can custody change because a child is struggling in school or emotionally?
Potentially. School performance, attendance, behavioral concerns, mental health, medical treatment, and a parent’s ability to meet those needs may all be relevant to the best-interests analysis. No single factor automatically determines custody.
Can a Massachusetts court give custody to a parent living in another state?
Yes. An out-of-state residence does not automatically prevent a parent from receiving custody. Courts examine the reasons for the parent’s move, the parent’s ties to the new community, the effect of relocation on both parents, and ultimately the child’s best interests.
Does moving a child without the other parent’s permission prevent that parent from later receiving custody?
Not necessarily. Improper conduct can be highly relevant, but the court must still evaluate all of the evidence and determine what arrangement presently serves the child’s best interests. R.K. v. R.M. illustrates that past conduct does not automatically dictate the final custody result.
Can parents share legal custody if one parent has final say?
Potentially. In R.K. v. R.M., the court maintained joint legal custody while giving the father final decision-making authority after the mother had an opportunity to participate. Because the decision is unpublished and fact-specific, it should not be treated as a general rule for all joint-custody cases.
What does “material and substantial change in circumstances” mean?
There is no single event that qualifies in every case. Courts examine whether circumstances have changed significantly enough since the prior judgment to justify reconsidering custody, and whether a change is necessary for the child’s best interests.
Is R.K. v. R.M. binding on Massachusetts courts?
No. The Appeals Court issued the decision under Rule 23.0. It may be cited for persuasive value but is not binding precedent.
Final Thoughts
R.K. v. R.M. illustrates how Massachusetts courts approach difficult custody-modification cases involving changing family circumstances, an out-of-state parent, and significant concerns about a child’s well-being.
The central lesson is not that one parent’s past conduct becomes irrelevant or that an out-of-state parent should receive custody.
The lesson is that Massachusetts custody law remains focused on the child.
A court considering modification must identify a material and substantial change in circumstances and then determine whether changing custody is necessary in the child’s best interests. In making that decision, judges may consider the child’s health, education, stability, treatment needs, relationships, and the strengths and weaknesses of each proposed household.
The decision also demonstrates the substantial importance of the trial record. Detailed findings concerning the child’s actual circumstances were central to the result, and the Appeals Court largely deferred to the trial judge’s assessment of credibility and competing evidence.
If you are considering seeking or opposing a custody modification, relocation, or change in legal decision-making authority, Turco Legal’s Massachusetts family law attorneys can help you understand the governing standards and how they may apply to your family’s circumstances.
About the Author: Damian Turco is the Founder and Managing Partner of Turco Legal and has practiced divorce and family law since 2008.
Damian Turco’s Bio Page | More Blogs from Damian Turco
This article is for informational purposes only and should not be interpreted as legal advice. Articles on our blog are written at a historical point in time and the information presented accurately reflects the law at the time of the article’s writing. If you’d like to better understand how the law applies to your case, schedule an attorney consultation by calling any of our offices or by clicking the Schedule a Consultation link on this page.