AN: The chapters are getting longer, at least I think they are. There's more action coming and more to describe. My friend made me a banner for this story and I think it came out well. I don't know if the image will post so I'll just leave the link here, if you'd like to see it, now that I'm done introducing the main characters with this . - That's the link and thanks bestie for making it. The woman that Kathie sees in my mind would look like Angelina Jolie. Angelina is very good at playing the bad guy and if I were writing this as an episode I'd cast her for this character in a heartbeat (but you probably got that from my username lol). Thanks for the reviews, I appreciate them a lot! It's great to see that you're enjoying the story.

It had been a little over a week that they had arrested Oliver. Kathie had spent some sister time with Kate for a few days. There was no talk of their mother's murder, just shopping, seeing a Broadway show, and having coffee in Central Park. Things had been really good and their sister bounding time was back.

Kathie had returned back to her apartment after a few days and Kate was back to work. They got a call that someone had found a body in an alley in Queens. Kate had never been so happy to go to a crime scene. Queens was where Kathie was and she was planning on visiting the school that Kathie worked at once they visited the crime scene.

"Castle, are you sure that you don't mind me dragging you to Kathie's school? You can always catch a ride from Ryan and Esposito".

"I am positive. I don't mind visiting Kathie. Besides, maybe I can get her to reveal an interesting story about you that I don't know" He smirked and Kate gave him a glare.

"I wouldn't hold my breath. I told her the last time to not believe anything that comes out of your mouth and that if she tells you anything I will take back the offer of baby sitting her dog when she goes on vacations".

"She has a dog! I've been following around the wrong Beckett". She gave him another glare before crossing the yellow tape.

"Hey Lanie" Kate said as she walked over to examining the body. It was a woman and she had been...stabbed...multiple times...just like her mother. The alley wasn't the same but it didn't matter. She shook the thoughts away, not needing to deal with this at a crime scene. "Who is she?" She asked when Esposito came back from searching around the crime scene for any other clues.

"Her name is Lana Peterson. She's a high school special education teacher according to her school ID. She works a flew blocks away".

That was what Kate was dreading to hear. That this was one of Kathie's co-workers. "I was heading over that way anyways. I'll go see if I can get any information from the other teachers". Kate crossed the yellow tape again with Castle and headed back into her car. She drove off towards Kathie's school.

Xxx

"Wait so I have to stab Andrew...I mean Cassio?"

Kathleen gave her student a famous Beckett glare as she stood on stage with two of her male students. "Robert, did you read the Act?"

"Well you see Ms. Beckett I was going to but then I got distracted. My dog..."

"Don't even give me that, you do not have a dog because your last excuse you used was that you put him to sleep".

The teenager snapped his fingers, forgetting he already used that line. "I really do not like it that you have such a good memory".

"Well I don't like it that my students don't read what is assigned to them". Just then Kate and Castle walked into the auditorium where Kathie's English class was acting out Othello. Kathie had to do a double take when she spotted them from the corner of her eye. "Well you just lucked out. The NYPD is saving you from me killing you with an extremely hard test".

Kathie stepped down from the stage and headed towards Kate. "NYPD?" Robert went to the edge of the stage. "Did Ms. Beckett kill someone?"

Kathie gave him a glare. She treated her students like grown ups, since most of them were 18, but she also knew when she had to be their teacher and guide them.

Kate smirked. "No, Ms. Beckett didn't kill anyone...well maybe besides my plant that I called Bob for my botany project".

"Oh let it go Kate. So I over watered it! At least it died on a full stomach".

"You named your plant Bob? Oh you're original"

Kate glared at Castle for that comment. "My class partner named it when I was absent. I had no say".

"Kate? So you're on a first name basis with the cops Ms. B? If I commit a crime can you get me out?" Robert asked.

"No, I am not bailing you out because you better not be committing any crimes to begin with!" She looked at Kate and then back at her class. "This is my sister, Kate, and her partner, Richard Castle. You would know of him if you guys actually read".

"That's because my books aren't on the required reading list. If they were they'd know me". He noticed the Othello book in Kathie's hands. "You're teaching them Othello!" He took the book from her hands as she looked just as confused as Kate. "This is my favorite Shakespeare play! I'll teach these kids everything they need to know about this book!"

"Castle that's my job".

"Kathie, if you haven't noticed by now he likes to take over people's jobs" She gave him a look.

"Not take over per say. I'd like to think of it as helping and sharing my incites".

Both Becketts rolled their eyes. Kate then looked over at Kathie. "While this one pretends to be Shakespeare do you mind if we talk...normally I wouldn't interrupt your class but it's about a crime scene".

Kathie nodded. "Alright listen up gentlemen and ladies! Mr. Castle is in charge of all of you until I come back".

"Did you guys get to the part where Othello dies?"

"Castle! Don't ruin it!"

"Yea, man I don't want to know the ending yet."

Kathie gave Andrew a look. "Were you even going to read the ending!"

"Probably not".

"I appreciate the honesty but that won't help you pass my class". She said before exiting the auditorium to the hallway with Kate. She looked at her once the doors were shut. "What's wrong? You didn't have another breakdown did you?"

"No, no...I'm fine...for now..." Kate showed her a picture of the crime scene and Lana's body. "Please tell me that I'm not the only one that sees the similarities".

Kathie was shocked that Lana had been murdered. Not only was her co-worker murdered but they seemed to be murdered in the same fashion their mother was. She looked at Kate as she bit her bottom lip. "No, you're not crazy...I see it too".

"Why her though?"

"To get to us. She works with me. The killer knows that we have Oliver in custody and that we're looking for her. She's just sending a message and poor Lana had to be the messenger".

Kate shook her head. "I never wanted you involved in this".

"Kate, the day mom was murdered I became involved in this! We can do this Kate! We can find her! We just have to do it slowly so she doesn't come after us".

"And how many more people are going to die because she wants to send a message to us?"

Kathie sighed. "I don't know...I wish I knew because then we could stop them but I have no way of knowing".

Kate looked at her sister and pulled her into her embrace. "If that was you..."

"I know...Don't worry Kate, we'll catch her. I promise you that". She pulled away from her sister when she heard the fake scream coming from the auditorium. They walked back in and saw Castle on the floor, pretending to be wounded.

"Oh, hey Becketts".

"Hi, Castle". They said in unison as he got up from laying on the floor.

"Ms. Beckett can you bring Mr. Castle in here more often! He said next time he'll react Romeo and Juliet. I actually might read it if he does".

"As much as I know you and Mr. Castle would enjoy reacting the play I'm afraid Mr. Castle is a very busy man and he can't keep up with both Becketts". She smirked and so did Kate. "If you'd like to see Mr. Castle to sign your book you can find him at the police station".

The final bell rang for the day and Kathie dismissed the class. Kate looked over to Castle. "Kathie is going to come back with us. She thinks she could help with this case". She didn't mention that this had to deal with her mother murder.

Castle nodded and was about to say something when Kathie interrupted him. "Oh and I already called shot gun".

"That's not fair! You have to be in proximity to the car in order to call shot gun!"

Kathie smirked and walked back to her classroom, that was across from the auditorium. She placed her jacket on and picked up her bag. If she was going to be staying with Kate she was going to need her laptop to post work for her students online.

Castle was busy looking at the picture's that were on Kathie's desk while she was making sure the windows and her closets in the room were locked. He noticed two pictures that caught his eye. One was the day Kate graduated from the police academy and the other was when Kathie graduated college. It was in a double frame and it was engraved on the bottom. It said. "Shoot for the stars girls because I know you two will do amazing things. - Mom".

Kate noticed where his gaze was and smiled softly. She had the matching frame in her bedroom with the same pictures. She then noticed the other frame that was on her desk. "Kathie, when did you meet Brad Pitt?"

Kathie smiled as she placed her bag on her shoulder's and Castle's head turned to look at the picture not believing it. "The week after my birthday when you called me a year ago and I told you I was going to California for the week. Brad Pitt happened to be getting coffee at Starbucks the same time I was. I lucked out".

"And you didn't call me?"

"I said I would call you if I met Matt Damon. I didn't want to get your hopes up". They walked out of Kathleen's classroom and locked the door. She waved goodbye to a few students that she had that had waved to her.

"Well isn't someone the popular teacher"

Kathie looked at Castle when she said that. "Yea, well it's easier to bound with the seniors. There mature, for the most part, and it is easier to connect with them than the younger kids...plus if you let a curse word slip by accident they won't run and tell the principal" She smiled softly as the three of them exited the building.

"We parked in the back". Kate said as she started walking with Castle towards the back of the school. Kathie didn't move though. She was looking at the woman standing in the baseball field, looking straight at her. Even though they weren't face to face they made perfect eye contact.

The woman had long brown hair and hazel...maybe blue...eyes, and luscious lips. She was dressed in a black trench coat and jeans. An evil smirk graced her face as she saw Kathie noticing her.

Images of the crime scene of her mother rushed through her head and the woman with half the face was standing in the middle of the field. Kathie didn't know what to do. Why would she show herself to her? Should she run after her? She was a good distance away, she could easily run away from her and into the woods that were by the school before she could get to her.

No, she had to do it. She couldn't let this woman get away again. That evil smirk proved to her that she was the one that killed her mother. She dropped her bags and sprinted towards the field.

"Oh Kathie, tell Castle about your dog. When I told him he said he was following the wrong..." She turned around to see her sister wasn't behind her. Her bags were on the ground and she wasn't in site. No, her dreams were not going to come true. No! "Kathleen!"

Kate ran back to where she saw her bags at, Castle close behind her. She looked at one of Kathie's students, Robert, that she recognized from before. "Did you see where she went?"

Robert pointed to the baseball field behind her. She saw Kathie going into the woods. What the hell was her sister doing. "Castle stay here!" Kate sprinted down to the field and into the woods, trying to get to her sister.

Surprisingly, the woman under estimated Kathie's running speed. Guess she didn't know she had FBI training and ran on her treadmill once every other day. She had the woman in site when she tripped over a root of a tree that was sticking out from the ground. She fell to the ground, but not without grabbing onto a piece of fabric from the woman's jeans.

That didn't stop the woman she was chasing though. She kept on running through the woods. She knew where she was going and that scared Kathie even more. She had been spying on her all this time while she was working.

She got up, with the piece of fabric in hand, and that's when she finally heard the screaming Kate calling her name.

"Kathleen!"

She didn't know whether to call for her or not. The killer was still in the woods. Sure, it wasn't in the direction that she heard Kate's voice but still could she trust it. She didn't have to worry about that anymore though because Kate had found her.

"Kathleen, what the hell are you doing running into the woods like that?"

"I saw her Kate" She held up the blue fabric. "Mom's killer...I saw her. I would have had her if it weren't for this stupid tree!" She felt the tears rolling down her face now. She was upset with herself that she hadn't caught the killer and that she was just toying with them.

"Kathie..." She pulled her sister into a hug. She hated to see her sister cry. It was one of the worst things to see. "You saw her...that's going to help so much in finding her. We're getting there. You did good, sweetie". Kate only used cute nicknames like that when her sister was really upset. She was going to do anything to calm her sister down and those names kind of helped for some reason.

Kathie just hugged her sister tighter. "My students probably think I'm a crazy woman". She laughed a bit and so did Kate. Laughter was music to their ears.

"Well then it will be a lot easier to tell them you had to take a trip to the looney bin than I had to catch your mother's killer".

Kathie pulled away and gave her a look. "Thanks, Kate. Very helpful" She shook her head. "Lets get out of her. I'm surprised Castle listened to you when you asked him to stay put".

"Well Robert was there and I think they bounded while acting out Othello. Maybe he'll actually read now.".

Kathie smiled as Kate and her walked back out of the woods. Kate made sure to put Kathie's arm around her shoulder for support. She saw her walking with a slight limp from tripping. "Kate I'm fine".

"Just making sure".

Kathie rolled her eyes before she kissed her sister's cheek quickly before exiting the woods. "Thank you, Kate".

"That is what sister's are for. I'll always be here to help you".