whydunit
Killer's reasoning revealed
A whydunit is a mystery story where the focus isn't on identifying the culprit—often revealed early—but on understanding their motive.
The satisfaction comes from psychological investigation rather than detective work: We know she did it; the question is why.
The term plays on whodunit, shifting emphasis from who to why.
Planned purpose
- reasonBasis or justification
- justificationReason proving rightness
- rationaleStated basis for action
- psychologyStudy of mind, behavior
backstory · jealousy · revenge · envy · greed · anger · hatred · resentment
Clandestine coordinated scheming
- deceptionIntentional misleading of others
- betrayalBreaking of trust
- secretsConcealed information
- manipulationUnderhanded control of others
double-cross · treachery · complicity · collusion · cover-up · blackmail · coercion · scheming
intent
Planned purpose
- reasonBasis or justification
- justificationReason proving rightness
- rationaleStated basis for action
psychology · backstory · jealousy · revenge · envy · greed · anger · hatred · resentment · obsession
conspiracy
Clandestine coordinated scheming
manipulation · double-cross · treachery · complicity · collusion · cover-up · blackmail · coercion · scheming · hidden agenda
detective
Professional crime investigator
interrogation · alibi · witness · testimony · sleuth · deduction · analysis · suspect · culprit · profiling
whydunitwhodunit
Crime fiction identifying perpetrator
howdunit · locked-room mystery · procedural · cozy mystery · thriller