Okay so I'm pretty new to fan fiction so I'm not sure if this has been done before, but I was thinking about it and decided to go for it. I hope you like it, and as this is the first kind of story like this I've ever written, please let me know how it is.

Preface: Kate Beckett had a one night stand the night after her mothers murder. She got pregnant, had the baby, and then gave her up for adoption because every time she looked at her all she could think about was the pain she felt that night. Sixteen years later, while investigating the serial murders of teenage girls, she found the one thing she could never forget.

Kate Beckett stared at the white in front of her. The blank white space, with only cold white faces on it looking back at her. No suspects, no leads, no known M.O's. Only five dead sixteen year olds.

She had spoken to every single parent of those beautiful children, and all she could think about was how to catch the son of a bitch who was killing these people who hadn't even had a chance to live yet. She stared harder, trying to forget all of the personal struggles and anguish that were taunting her on this case, and just find the killer, or at least some piece of evidence on him.

She heard footsteps behind her, and turned to see Castle walking towards her with a fresh cup of coffee. How did he always manage to know when she needed caffeine? In fact, why did she even need more caffeine? It was only 9:00 in the morning, she had already had a cup in bed that morning that he specially fixed for her, the cup he always brought in the mornings, and the one only thirty minuets ago. Oh well though, she thought, it's better to be addicted to coffee than crack.

And she had had to much experience with that drug over the past few days. The murders had first looked like they were related to a teenage drug circle, as the stuff had been found at every crime scene. But now the tox results were in and none of the girls had any drugs in their system, and record showed no past substance abuse. It had been another dead end.

Just as Beckett headed back to her desk to do another search on the way the killer attacked, drowning the victims in a bucket of bleach, which the remaining contents of which was used to wipe the places down, Esposito called out across the bullpen about a fresh one uptown.

Castle and Ryan grimaced, and Beckett just put her head down on her desk, and told Castle "to wake me up when it's over." before lifting her body up from her chair and grabbing her keys.

She and Castle drove her cruiser over to the crime scene. When they got there, and stepped out of the car, and under the yellow tape to the crime scene they saw a body on a stretcher, with paramedics surrounding it, and frantically calling for help.

"What the hell happened?" Beckett asked one of the medical people who had just hung up their phone. The medic looked at her and blinked a couple times, before shaking his head slightly and continuing "The victim is not fully dead yet. It appears as though she was being murdered when her parents came home earlier than expected. The killer shot both parents, killing them instantly, and, assuming the girl dead, left her lying on the floor upstairs and took off, not bothering to clean up or check the girls pulse. She and the parents were discovered a couple minuets later by neighbors who heard the shots and came as soon as they could." The paramedic finished, just as an ambulance came screaming up with more medical professionals jumping out with equipment.

Beckett looked on, hoping that the girl would be okay. If she lived they would have caught the killer, and saved his latest victim in one, though she ached for what the girl would go through when she awoke without parents.

As she mused, she saw more than one person look at her, and some were starting to whisper.

She was just about to ask what was going on with them when the paramedics dictated that it was time to move her. They slowly moved the stretcher, being careful not to bump anywhere. And as they passed by Kate, she saw what they had all been whispering about.

The girl looked exactly like her.

So, this chapter is more of a prelude, that's why it's so short, but I hope it was all right, I wrote it late at night so who knows? Any thoughts? Positive or negative. Thank you for reading!