Here's a breakdown:
* The truth about the crime is revealed: Rob Ryan, the main character, discovers that the killer was not one person, but two: the boy who was initially suspected, Adam Ryan, and his older brother, Harry Ryan.
* Adam's role: Adam was abused by his brother and, traumatized, was involved in the murder but not entirely in control. He had amnesia and was manipulated by Harry.
* Harry's role: Harry, the true mastermind, orchestrated the entire crime. He was motivated by a desire for control and power, stemming from his own warped view of masculinity and his resentment of his brother.
* Justice is served: Harry is ultimately caught and convicted for the murder.
* Rob's journey: Rob grapples with the complexities of the case and the personal connections he made with both Adam and Harry. He recognizes the profound impact of abuse and the destructive nature of Harry's actions.
* The ambiguous note: While the perpetrator is apprehended, the novel doesn't explicitly state the fate of Adam. This leaves the reader to ponder Adam's future and the lasting impact of the trauma he endured.
The ending is a powerful testament to the lasting impact of violence and the consequences of hidden secrets. It also highlights the importance of empathy and understanding, even in the face of horrific crimes.
Overall, the ending is open to interpretation, leaving the reader to reflect on the themes of justice, guilt, and the resilience of the human spirit.