The most difficult mysteries to solve are often the ones that present themselves late in the story, as they lack sufficient evidence to fully understand or resolve. Without enough clues, unraveling the truth can feel impossible, leaving the resolver stuck at a dead end.
As the quote suggests, sometimes the only way to truly understand these complex cases is to revisit the beginning, re-examining every detail in a fresh way. This approach, like rewinding and replaying a story, helps uncover hidden clues and provides new insights to solve the mystery.