The daughter of Dr. Valerie Barnes and Navy SEAL Ryan Barnes, Rachel presumably began displaying signs of being a sociopath at a young age, greatly scaring her mother who later grew frightened of her young daughter with Valerie attempting to get her daughter treatment at a medical facility in Montana.
Rachel who was in denial later grew to resent her mother for this and began injuring herself to such an extent that she was hospitalized so that her father would stay longer.
NCIS Season 12Edit
At some point, she crept to her house during that night and retrieved a gun which she then used to shoot her mother in the back, the impact killing Dr. Barnes instantly.
At first glance, Rachel appeared to be just like any other child her age: sweet and innocent but in fact, Rachel was a cold, emotionless, unfeeling sociopath who disliked her mother, preferring her father to stay with her.
Rachel often went to great lengths to get her father's attention by even going as far as to injure herself which saw her being hospitalized as well.
She even displayed little to no remorse for her actions and also seemed to be in great denial about the fact that she was a sociopath, Rachel herself even insisting that she was fine.
Rachel is a young girl presumably aged ten or eleven with long blonde curly hair which was kept into two separate pigtails that hung down covering both her ears and brown eyes.
Despite being a child, Rachel showed great skill with firearms as she was able to use a gun to accurately shoot her mother in the back, the shot itself resulting in Valerie's own death.
- To date, Rachel Barnes is the youngest murderer ever to have appeared on the main NCIS series and quite possibly the NCIS franchise itself which is composed of JAG, NCIS, NCIS: Los Angeles and NCIS: New Orleans.