Agatha Christie. Rhodes triangle (№ 256273)

- It's awful! - she cried. - Terrible! You said! You saw it coming!
He sadly bowed his head.
- Oh! she cried and stamped her foot. - You should have prevented it! At any cost! It could have been prevented!
- How? asked Hercule Poirot.
The question for a moment brought her to her senses.
- You couldn't go where it should... the police?..
- What to say? What can we say before this happens? That someone planned a murder?