17-year-old Brittani Marcell was attacked in her home by a man wielding a shovel. The man was able to escape through a window as Brittani's mother came home, leaving behind only a single drop of blood. Due to the severity of the attack Brittani lost all memory of the events that day, which left everything down to the drop of blood. For years the case was cold until Brittani underwent through pyschotherapy and was able to give investigators a name.

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