1. He bore the mark of Cain during his fake murder.
2. He was the only one in the story that didn't "murder" someone. He sentenced Seton to his death when he was guilty. (even though no one really believed Seton was guilty, the police did) By using the process of eliminations, he is the police would know murder.
3. The message in the bottle (in epilogue)
Sorry if this gives away the murderer....
Judge Wargrave.
The clues in "And Then There Were None" that lead to the resolution of the mystery include the nursery rhyme, the deaths of the characters matching the rhyme, the hidden confession in a bottle, and the reveal of the true identity of the killer.
In the book "And Then There Were None" by Agatha Christie, the murderer is Judge Lawrence Wargrave, who orchestrated the deaths of all the victims on the island. He reveals himself as the killer in a confession letter left at the end of the story.
There are none since there are none
The murderer in "And Then There Were None" follows the poem closely as part of a twisted game to exact justice on those they believe have committed crimes without facing consequences. By structuring the murders around the lines of the poem, the murderer adds a chilling sense of order and inevitability to their actions, heightening the sense of doom among the victims. This meticulous adherence to the poem also showcases the murderer's intelligence and careful planning throughout the story.
None. You need many.
I suspect that he is the murderer As in I think he is the murderer. there were 5 suspects in the police department, but none of them were actually the murderer. There were five people that the police thought were the murderers, but they really weren't.
There is none.
None recorded in the history of United States.
In Agatha Christie's novel "And Then There Were None," William Blore is killed by a marble bear clock falling on his head, orchestrated by the murderer, who remains unknown until the end of the story.
There is none but you can add this card P3WKMFH2XP
In the book And Then There Were None, Mr.Justice Waregrave was the murderer. Justice Wargrave had asked Dr Armstrong to fake his death so he can rattle the people. All of the deaths after Mr Wargrave's were a coincidence. Justice Wargrave had put the potassium cyanide in Anthony Marston's drink and put sleeping pills in Mrs Rogers' drink. He had also hit Mr Rogers and General MacArthur in the head with a blade and inject a poison into Emily Brent's neck.