The Turn at Doncaster
The A.B.C. MurdersThis thread follows the campaign’s apparent fourth attack from warning and preparations through the mistaken victim and Cust’s arrest.
increasing
Bearing strength in each event
decreasing
The Fourth Warning

Doncaster Announced
A precise threat
A letter names Doncaster and September 11, coinciding with St Leger race day. The promised location and date create a vast security challenge.
Crowds as cover
Police prepare to watch a packed town and racecourse. Franklin’s choice makes it possible for a perpetrator to disappear among visitors.
A Public Search

Eyes on the Crowd
Divided observers
Poirot and the Special Legion spread out while police patrol Doncaster. Their effort is extensive, but none can easily recognize a man they have barely seen.
A vulnerable target
Roger Downes, a schoolmaster, sits near George Earlsfield in the cinema. The crowded setting creates the confusion the killer requires.
The Wrong Man Stabbed

A Killing in the Cinema
The fatal confusion
Franklin stabs George Earlsfield, apparently intending to attack Roger Downes, whose build and scarf resemble the victim’s. The planned pattern becomes visibly imperfect.
A conspicuous prop
An ABC guide is left near the body. This time the sign does not create a clean alphabetical fit; it instead exposes the scheme’s artificiality.
The Near Miss

Downes Escapes
A witness survives
Police conclude that Downes was probably the intended victim. The mistaken identity shows that the killer’s control is not absolute.
A trail appears
A hotel maid reports a guest washing blood from his sleeve. The detail gives investigators a concrete description and finally connects the stockings to the suspect.
Cust Is Named

From Clue to Arrest
The lodging record
Cust’s name and hosiery stock link the evasive salesman to the crime scene. The police find railway guides and the weapon in his London lodgings.
The wrong conclusion
Cust is treated as the ABC killer, although Clarke remains concealed. His arrest ends the public hunt but not Poirot’s search for the motive and truth.
Early September 1935
September 11, 1935, morning
September 11, 1935, during the afternoon film
September 11, 1935, after the cinema killing
September 11–12, 1935