Plot to poison Mollie Burkhart

The plot to poison Mollie Burkhart was the suspected, unfinished end of William K. Hale’s campaign to profit from the deaths of her family. The danger was difficult to separate from illness: Mollie had diabetes, and doctors were treating her with injections said to be insulin. Yet she was getting worse, not better. When authorities finally arranged for her care away from the household and its influence, she improved. The investigation never proved who had poisoned her, but the sequence made her illness a crucial part of the murder inquiry and exposed how vulnerable she remained even as investigators closed in on Hale.

Wealth and the Unfinished Plot

By the time investigators became alarmed for Mollie, Hale had arranged, “corpse by corpse,” for her to inherit most of her family members’ wealth. The phrase describes a material consequence of the preceding killings: each death had shifted property toward Mollie, leaving the accumulated fortune concentrated in her hands. But that arrangement did not yet give Hale direct control of it. His access ran through his nephew, Ernest Burkhart, and Ernest would control Mollie’s fortune only if she died and left it to him.

That condition made Mollie’s survival consequential to the people investigators suspected. The succession of earlier deaths had brought wealth to her, but the transfer was not complete from Hale’s perspective. Investigators believed the plot remained unfinished so long as Mollie lived. A servant in her home told an agent that Ernest, drunk one night, had muttered that he feared something would happen to his wife. The reported remark did not establish what Ernest knew or intended, but it placed fear of Mollie’s fate inside the household and suggested that even he dreaded what the conspiracy might bring next.

Warning Signs and Suspected Methods

Mollie’s own fear reached investigators through her priest. John Wren, the Ute agent, had recently spoken with him and learned that Mollie had stopped attending church, an unusual change. The priest had also heard that family members were forcibly keeping her away. Alarmed enough to break the confidentiality expected of him, he later reported receiving a secret message from Mollie: she feared that someone was trying to poison her.

The warning had a concrete context. Poisoned whiskey had been one of the killers’ preferred methods, and the priest sent word advising Mollie “not to drink any liquor of any kind under any circumstances.” But whiskey was not the only suspected route. Mollie had diabetes, and some local doctors, including the Shoun Brothers, had been giving her injections described as insulin. Instead of improving, she seemed to grow sicker. Investigators and government officials feared that the treatment itself might be delivering poison under the appearance of ordinary medical care.

The United States Department of Justice had already recorded concern that Mollie was being slowly poisoned. An official described her “illness” as “very suspicious, to say the least,” and urged that she be taken to a reputable hospital for diagnosis and treatment, free from her husband’s interference. The proposed safeguard mattered because the danger was not confined to one suspected substance: the treatment she was receiving, and the people around her, had become part of the question investigators needed to resolve.

Removal from the Household and Medical Inquiry

After authorities moved to round up Kelsie Morrison, they also ensured that a doctor examined Mollie. By then she seemed near death. On the basis of her symptoms, the authorities were certain that someone had been poisoning her slowly, in a manner intended not to attract suspicion. An agent later reported that her recovery began when she was removed from the control of Ernest and Hale. The change in her condition strengthened the suspicion, but it did not identify who had administered poison or establish the exact mechanism.

Investigators questioned the Shoun Brothers about the injections. A prosecutor pressed James Shoun on whether he had been giving Mollie insulin; he answered, “I may have been.” Asked whether she had worsened and whether she improved after being taken to a hospital in Pawhuska and placed in another doctor’s care, he said he did not know. James and his brother denied wrongdoing. The exchange preserved the central contrast—the injections associated with worsening illness, followed by immediate improvement under different care—without supplying proof of deliberate poisoning by either doctor.

Mollie’s Testimony and the Limits of Proof

Once she was feeling better, Mollie was questioned by authorities. She did not like being treated as a victim, but on this occasion she admitted feeling scared and bewildered. At times she relied on an interpreter to help her with English; in the investigation, language itself could not make the secrets surrounding her household fully clear. An attorney assisting the prosecution tried to reassure her that those questioning her were working on her behalf, then told her that Ernest had confessed to knowing something about the murder cases and that Hale had apparently engineered them, including the bombing of her sister Rita’s house. When asked whether Ernest and Hale were relatives, Mollie confirmed that they were kin.

Her recovery established that removal from the household coincided with a dramatic change in her health, and her fear of poisoning was no longer only an unverified rumor passed through a priest. Still, the investigation could not prove who was responsible for the suspected poisoning, and Mollie’s account did not resolve that question. The episode therefore ended with both a practical rescue and an evidentiary limit: authorities had separated her from the people they feared, but could not turn the suspicious treatment and recovery into a proven identification of the poisoner. The threat also clarified the structure of the larger conspiracy. Mollie had become the inheritor of wealth produced by her family’s deaths, yet that inheritance left her exposed to a further attack intended to complete its transfer.