Human desires are not limited to money... We will always harm others for various reasons, consciously or unconsciously.
What has been lost is lost. Even if it can be found one day, the traces of the loss can never be erased. Those traces will be baptized by time throughout a person's life.
Everyone has the urge to kill, just like food and sex, it's just a simple desire.
Because you want to fly, you fall; because you want to run, you fall
Human beings always have to bear the consequences of their own choices.