James Whitfield had been a school principal for thirty-one years. He had run a campus of eight hundred students in McKinney, managed teachers, handled parents, made decisions under pressure every day. When he was diagnosed with moderate Alzheimer's disease in the fall of 2019, his family understood that the man they had always known was beginning a long, slow departure. But they did not expect the departure to produce a new will.
For two years after the diagnosis, James lived with his daughter Patricia in her home in Allen. His son Robert, who had relocated to San Antonio after an estrangement from Patricia, called monthly but visited rarely. Patricia drove her father to his doctor's appointments, managed his medications, and handled the steady administrative work that Alzheimer's demands: the insurance correspondence, the pharmacy, the paperwork. She was, by any fair measure, his primary caregiver.
In November 2021, Patricia drove James to see a new estate planning attorney — not the one who had drafted his will in 2013, who knew both children and the family's history. The meeting lasted forty-five minutes. James signed a new will. The old document had divided his estate equally between Robert and Patricia. The new one left everything to Patricia. James died in February 2022. He was seventy-nine.
When Robert learned what the will said, he called a probate litigation attorney. He had two instincts about what had happened. His father had been diagnosed with moderate Alzheimer's. His father had been living exclusively in Patricia's home. His father had been driven to a new attorney by Patricia, without Robert's knowledge. Was the will the product of a mind too impaired to understand what it was signing? Or was it the product of Patricia's influence over a weakened man?
Robert's attorney listened carefully, then asked a question that framed everything that followed: "Do you understand that those are two different claims?"
The Most Common Misconception in Will Contests
Families who contest a will almost always arrive with a version of both theories simultaneously. "Mom wasn't thinking clearly" and "my brother was manipulating her" feel like the same argument — one event seen from two angles. In ordinary conversation, they are. In a Texas probate courtroom, they are distinct legal theories with different elements, different burdens, different evidence strategies, and different weaknesses. Conflating them is one of the most common mistakes a family can make in the early stages of a will contest.
Understanding the difference — and knowing which theory the facts best support — is often what determines whether a contested estate case produces a settlement, a courtroom victory, or a quiet dismissal.
Testamentary Capacity: A Standard Built Around a Single Moment
Under Texas Estates Code § 251.001, a person has testamentary capacity if, at the moment they execute the will, they satisfy four requirements. They must understand: the nature and extent of their property; who their natural heirs are (the people the law would expect them to consider in making a will); what executing a will means and what a will does; and how those three elements fit together into a coherent plan for distributing their estate.
Notice what the statute does not say. It does not say the testator must be sharp, organized, articulate, or free of cognitive disease. It does not require that the testator remember details they would have known ten years earlier. It requires only that, in the specific moment of signing, they understood the four elements above.
Texas courts have long applied this as a deliberately modest standard. The underlying principle is one of testamentary freedom — the idea that people have the right to dispose of their property as they choose, and that courts should be cautious about overriding that right based on a general sense that the testator was not well. The threshold is low. Many people who are plainly diminished by disease can still clear it.
This creates the first complication for families like Robert's. An Alzheimer's diagnosis does not establish lack of testamentary capacity. It is evidence — relevant, admissible evidence — but it is not the finish line. What matters is whether James, on the specific afternoon in November 2021 when he sat across from that attorney and signed the new will, understood his property, his family, the nature of the document, and the relationship between them. A man can fail to recognize his son's face at breakfast and still satisfy the § 251.001 standard at 2 p.m. when he executes an estate planning document. Texas courts have called this a lucid interval, and they have consistently held that a will executed during a lucid interval is valid regardless of the testator's condition before or after.
To win on capacity grounds, Robert would need evidence tied to that day, that meeting. The attorney who oversaw the signing would likely testify that James had been responsive, oriented, and coherent. Robert would need to counter with evidence that the coherence was superficial — that James's answers to the attorney's questions were rote or confused, that his understanding of the property and beneficiaries was incomplete, that the "four elements" were not actually present even if James appeared functional. That evidence typically requires: the attorney's own notes and intake records; the testimony of witnesses present at or around the signing; James's medical records from that period showing his cognitive state; and often a retained geriatric neurologist who can review the records and offer an expert opinion on whether someone with James's documented disease trajectory could have met the statutory standard on that specific date.
Capacity cases are won and lost on the specificity of that evidence. General proof of cognitive decline — a year-old diagnosis, observations from family members about forgetting names, a prescription for donepezil — creates a background picture but does not by itself establish incapacity at the moment of signing.
Undue Influence: A Standard Built Around a Relationship
Undue influence is an entirely different theory. Its foundational Texas case is Rothermel v. Duncan, 369 S.W.2d 917 (Tex. 1963), and the standard it established has governed Texas will contests for more than sixty years. To prove undue influence, a contestant must show three elements: (1) the existence and exertion of an influence; (2) the effective operation of that influence so as to subvert or overpower the testator's mind at the time of will execution; and (3) the execution of a will that the testator would not have executed but for that influence.
The operative word is overpower. Influencing someone is not enough. Persuading them is not enough. Being present, being attentive, expressing opinions, reminding them of loyalty and sacrifice — none of that constitutes undue influence, even if it shapes what the testator ultimately decides. Texas courts are firm: a caregiver who is genuinely appreciated, and whose testator freely decides to reward that appreciation, has not exercised undue influence. The testator's freedom to make choices that others find unfair or surprising is exactly what testamentary freedom protects.
What undue influence requires is that the influencer's will was effectively substituted for the testator's own — that the testator, due to a weakened mental state and the influencer's domination, could not freely exercise their own judgment and was instead executing someone else's wishes under the form of their own.
Courts examining undue influence look at a constellation of circumstances: the nature and extent of the relationship between testator and alleged influencer; the testator's mental and physical condition and susceptibility to influence; whether the alleged influencer was present when the will was made or when the decision was discussed; whether the resulting will represents a significant, unexplained departure from the testator's prior expressed wishes; whether the testator was isolated from other family members during the relevant period; and whether the alleged influencer had motive, opportunity, and control over the testator's daily circumstances.
Notice the structural difference. Capacity asks: was this person capable of making a valid will on that day? Undue influence asks: even if they were capable, was this actually their decision? The first theory attacks the testator's mind. The second attacks the integrity of the decision-making process.
Why the Distinction Changes Everything About Your Evidence Strategy
In James Whitfield's case, Robert's two instincts pointed to two different evidentiary paths that would have to be built and argued separately.
For a capacity claim, Robert needed evidence about his father's mental state on the day of signing. He needed the attorney's file, James's medical records from fall 2021, expert testimony from a neurologist, and witness accounts of James's behavior in the weeks surrounding November 2021. The strength of the claim depended on pinning the medical picture to a specific moment.
For an undue influence claim, Robert needed a much broader body of evidence: the history of Patricia's control over James's daily life; evidence of isolation (fewer visits from friends, limited access for Robert); any statements James had made about his wishes before the move to Patricia's home; the timing of the will change relative to the period of Patricia's caregiving; the selection of a new attorney rather than the family's longtime estate planning lawyer; financial records showing whether Patricia had gained control over James's accounts; and testimony from people who had observed the relationship between Patricia and James in the two years before his death.
Questions about probate litigation? A WG Law attorney can walk you through your options.
These are not the same investigation. They do not produce the same witnesses. They do not succeed or fail for the same reasons. A client who walks in and says "both" has, in effect, asked for two cases to be built simultaneously — which is possible, but which requires a legal team that understands what each theory demands and how they interact at trial.
Can You Plead Both at Once?
Yes. Texas courts permit contestants to plead lack of testamentary capacity and undue influence as alternative or concurrent grounds, and many will contests raise both. Doing so is often strategically appropriate when the facts support each theory independently. A testator who was cognitively impaired is also more susceptible to undue influence — and the same evidence that helps establish incapacity (isolation, dependence, cognitive disease) can also support the susceptibility element of the undue influence claim.
But there is a tension in pleading both that experienced probate litigators know well: the theories can subtly undercut each other. Capacity requires proving the testator was incapable of understanding what they were doing. Undue influence requires proving they were capable of understanding — but that their understanding was effectively overridden by another person's will. If you push the incapacity argument too hard, you inadvertently suggest that the testator was so far gone that no external influence was needed (or that influence was irrelevant because there was no mind to overpower). If you push the undue influence argument, you implicitly acknowledge that there was a mind capable of being influenced, which strengthens the capacity defense.
A skilled probate litigator manages this tension by identifying which theory is better supported by the facts and leading with that theory while using the other as a secondary ground. The evidence gathered during investigation often answers the question: is the stronger story "Dad didn't understand what he was signing," or "Patricia steered him toward a decision he would never have made independently"?
The Two-Year Deadline and Why Moving Quickly Matters
Whatever theory you pursue, the clock starts at probate. Under Texas Estates Code § 256.204, a will contest must be filed within two years of the will being admitted to probate. Missing that deadline typically ends the case regardless of its merits.
The two years can feel comfortable until it isn't. Building a capacity case requires obtaining medical records that take time to gather, retaining an expert who needs months to review and produce an opinion, and potentially conducting depositions of the attorney who oversaw the signing. Building an undue influence case requires assembling documentary evidence — bank records, phone records, caregiving logs, emails — that third parties control and that subpoenas take time to reach. Both cases benefit from early investigation, when witnesses' memories are fresh and documents haven't been destroyed or lost. The family that waits until the deadline is approaching to hire counsel is almost always at a disadvantage.
Standing to contest also matters. Under Texas Estates Code § 22.018, an "interested person" who would have inherited under the prior will or under intestacy has standing to contest. Robert, as the son omitted from the new will who would have received half the estate under the prior will, had standing. But standing must be established, and the court will examine it.
What Happened With the Whitfield Family
Robert's attorney spent six weeks investigating both theories. James's medical records from fall 2021 showed moderate-to-severe cognitive impairment at that period — more advanced than the "moderate" diagnosis from two years earlier. The attorney who had supervised the new will's signing had notes describing James as "oriented and responsive," but also documented that Patricia had been present throughout the meeting, which is unusual when one beneficiary stands to gain exclusively from the resulting document and another stands to lose everything.
The investigation also produced financial records showing that Patricia had been added as a co-signatory on James's primary bank account fourteen months before the will signing — the point at which her control over his financial affairs began. Neighbors of Patricia's recounted that James's longtime friends had largely stopped visiting during the period he lived with her. Robert himself had logs of phone calls to Patricia's number that went unreturned for weeks at a time.
The capacity claim was strong on the medical facts but vulnerable to the lucid-interval defense. The undue influence claim was strong on the relationship evidence and the isolation pattern. Robert's attorney led with undue influence, using the capacity evidence to reinforce the susceptibility element — James's advancing disease made him more vulnerable to exactly the kind of sustained, daily influence that Patricia had the opportunity to exercise.
The case settled fourteen months after filing, before trial. The terms are confidential, as most contested estate settlements are. What the investigation built, and what the litigation posture conveyed, produced a negotiated outcome that neither party achieved by letting the will stand as filed.
The Lesson for North Texas Families
The question families ask — "wasn't Mom incapable, or wasn't she manipulated?" — is the wrong frame. In Texas probate court, the question is: which legal theory do the facts best support, which evidence does that theory require, and how much time do we have to build it before the two-year window closes?
Answering that question well requires a probate litigation attorney who has built both kinds of cases — who knows the difference between cognitive records that establish incapacity and relationship evidence that establishes undue influence, and who can honestly tell you which path your facts support before you commit to a strategy that can't be changed midway through litigation.
WG Law's probate litigation attorneys — Therese Gutierrez and Stephan D. Hwang — handle contested estate matters in Collin County, Denton County, Dallas County, and Tarrant County, including will contests grounded in lack of testamentary capacity, undue influence, or both. Stephan has litigated before the Fifth District Court of Appeals in Dallas and holds federal bar admission in the Northern and Eastern Districts of Texas. Therese brings deep probate-administration experience to contested-estate analysis and is bilingual in English and Filipino/Tagalog.
If you believe a will was signed by someone who lacked capacity or was unduly influenced, the investigation should start now — not when the two-year deadline comes into view. WG Law offers a free probate case review for contested estate matters.
Call 214-250-4407 or contact WG Law to speak with a probate litigation attorney.
Offices in McKinney (7701 Eldorado Pkwy, Suite 200) and Southlake (1560 E Southlake Blvd, Suite 100). Serving McKinney, Frisco, Plano, Allen, Allen, Carrollton, Denton, and the greater DFW metroplex.
This article is general information, not legal advice. Every estate dispute is different. Contact a licensed Texas probate attorney to evaluate the specific facts of your situation.