Euler discovered that if you make more entrances than exits, you will be stuck there! In the crime fiction novel Presumed Dead, the crime reconstruction is solved using this insight. How smart is that? https://wp.me/P1z4yo-n
Many crime fiction stories are solved by luck, by coincidence, by interrogation and by confession. These are not often available in investigation of real crimes and the CI has to rely on search for evidence and analysis. This can be haphazard or systematic and efficient. In the political crime fiction novel Presumed Dead, the CI follows an Euler Walk to reconstruct the crime efficiently. The method could be widely used, even by other crime fiction writers.