The Hunt for Anna’s Killer
Killers of the Flower MoonThis flow follows the competing theories, false leads, and investigative breakthroughs surrounding Anna Brown’s murder.
increasing
Bearing strength in each event
decreasing
Bryan’s Initial Account

Bryan’s Initial Account
Last Seen Together
Bryan Burkhart tells investigators that he left Anna Brown at her home after Mollie’s gathering. He says he then went to Fairfax to join relatives and watch a show.
Early Suspicion
Because Bryan was the last known person with Anna, investigators question him. Yet the available evidence is too weak to hold him, and his account initially appears consistent with the family’s recollection.
The Ex-Husband Suspect

The Ex-Husband Suspect
A Plausible Motive
Suspicion turns toward Oda Brown, who had contested Anna’s will after her death. A jailed forger claims that Oda paid him to kill her.
A False Confession
Authorities cannot corroborate the story, and the forger’s account collapses. The episode demonstrates how a dramatic confession can distract from evidence that should be independently verified.
A Manufactured Accusation

A Manufactured Accusation
A Jealousy Story
A witness claims Rose Osage confessed to shooting Anna over a romantic rivalry. Investigators also hear that a stain in Rose’s car looked like blood.
The Story Falls Apart
The supposed confession is fabricated by a stranger who pressured the witness to sign. Rose and Joe Allen’s alibi is supported, and the case reveals deliberate disinformation.
The Ralston Sightings

The Ralston Sightings
Witnesses Reconsidered
Undercover agents find witnesses who recall seeing Anna and Bryan together in Ralston after Bryan claimed to have left her at home. Their testimony breaks the apparent certainty of his alibi.
A Longer Night
Further accounts place the pair at drinking establishments into the early morning. A witness remembers a man urging Anna into a car, after which she disappears.
The Third Man Revealed

The Third Man Revealed
An Informant Exposed
Ernest Burkhart identifies Kelsie Morrison as the third man and says Morrison shot Anna. The discovery overturns the Bureau’s reliance on Morrison as a trusted source.
Trial Confirmation
Morrison later describes how he and Bryan brought the intoxicated Anna to the ravine. The courtroom testimony gives a grim account of the killing while showing how investigators themselves were deceived.
May 1921
Summer 1921
1923 to 1924
August 1925
1926