noun
murder swap; murder exchange
A scheme in which two or more conspirators agree to kill each other's intended victims, aiming to eliminate motive and reduce suspicion. Often used in crime fiction and legal contexts.
交換殺人は、推理小説でよく使われるトリックだ。
A murder swap is a trick often used in detective novels.
警察は交換
The police are investigating the possibility of a murder exchange.