Poirot visits her parents and her relatives to ask some questions, including
Elizabeth’s boy friend. He finds some useful facts that will be used for solving the
crime later. He also notices that the murders follow the alphabet structure.
A conference is at last held at Scotland Yard. The conference discusses the
ABC case. It is visited by some important people from police department.
Another letter is sent to Poirot. This is the third letter. It tells him that the
murder will happen in Churston on the 30
th
. Mr. Carmichael Clarke becomes the third
victim of the killer and as usual, the ABC guide found deposited beside his body.
Poirot and some policemen meet Franklin Clarke, the victim’s only brother. They ask
some questions to him to find some proves.
The story switches again to Mr. Cust. He says that he has a headache and
sometimes he does not even understand what he have done.
The serial killer becomes reporter’s main breakfast. Lots of newspapers report
it and make it as their headline. However, Poirot finally makes a hypothesis. He
explains what have happened so far. They also get the description of the murderer.
The fourth letter arrives and tells that another murder will take place at
Doncaster on the 11
th
September. The victim is, surprisingly, a man called Earlsfield,
George Earlsfield. His name begins with letter E so it does not match with the serial
murders, which happened so far. However, the ABC guide still found in the dead
body. Poirot and friends meet the man who found the dead body. His name is Mr.
Downes. They think that the killer takes a wrong person. It is Mr. Downes who
should be the victim.