A/N: This chapter is split up again into 2 parts. Read and Review I really want to know what you guys are thinking about this. You've been pretty good about reviewing so keep it up and the next update will come as soon as I get it back from my beta.

Ryan and Espo came up from the morgue, and found Beckett updating the murder board. "Woah! Diane Gates is a suspect?" Ryan asked.

"We don't know yet. Renee saw her arguing with our vic last week. It's the only solid lead we have, so I need you to track her down and bring her in for questioning."

"Does Gates know?"

"Yeah, she told us to follow this investigation where it leads but to tread carefully. So that's what we're doing."

"Alright I'll make some calls."

Castle spoke up, "Want to grab Remy's for lunch?"

"Okay I could use a bite to eat. Let's go." She put the marker down, grabbed her coat and headed toward the elevator. Castle trailing behind her.


They picked a booth towards the front, wanting to be able to leave quickly if they caught a lead. The waitress came over and took they're order.

"So did you really think about moving to the suburbs when Alexis was born?"

"Yeah I did. I wanted her to have the life I never had, a stable place that she could call home. I didn't have that growing up, mother was always doing shows and on the move, I never had one place that I could call home. Don't get me wrong I had a great childhood, mother always made sure I had what I needed but I didn't want the life for Alexis. With Meredith constantly coming and going I thought she would need a stable home. " Kate smiled at him while he explained, she loved hearing about him being a father. It was a different side to him, she didn't see it often but when she did it reminded her that he could be serious, not act like a 9 year old on a sugar rush all the time.

"So why didn't you move?"

"Well, as much as I wanted that life for her, some of my best memories are living in the city, exploring, there's so much culture and life to discover. I didn't want her to miss out on that. I wanted to take her out and show her the things living in the city can offer, plus it has great schools, a secure building and I could afford it fresh off another bestseller. There was no downside." He shrugged like it was simple, like it was the easiest decision he's made.

Kate fell in love with him even more, if that was even possible. She loved that he put so much thought into how Alexis was raised, and how he always put her first. Even though she didn't have the best mother, he more than made up for it. That is why she had started to fall for him years ago. Whenever she saw a glimpse of this side of him, she realized he wasn't the man on page 6 she had read about; he truly cared about the people he loved and was always there for them. She was stubborn all those years ago, refused to see what was right in front of her but now there was no denying it. He loved her, he really did. It's not that she didn't believe it when he told her but both times had been in times of trouble.

Castle noticed her staring off into space, "What are you thinking about?

"Nothing, it's nothing." Castle wasn't sure if he believed her but it didn't look like anything was worrying her so he let it go.

The waitress came over set their food down, "If you guys need anything else just let me know." They nodded back.

"So what about you?" Kate looked up from her food, a puzzled look on her face. "I mean have you thought about moving to the suburbs if you ever had kids?"

"I never really gave it much thought but I grew up in the city and I turned out just fine."

"What about your wild child phase?" Castle eyed her.

She rolled her eyes; "Well every child goes through that regardless of where they live."

"That's true I remember one time at one of the boarding schools I went to, me and a group of guys would tie each other up in a chair and see how long it took to get out. Well we tied up one guy and this other person in the group decided to light the rope on fire. We did this in the dorm so the fire alarm went off, setting off the sprinklers. I have never seen girls run out screaming so fast. The guy who set the rope was expelled and the rest of us were suspended for not stopping him."

She chuckled and shook her head. They had already finished their burgers, now picking at their fries waiting for Ryan or Espo to call. Her phone rang right at that moment. "Beckett. Alright be right there." She hung up, "Boys found her let's go."

As they got up and walked up out, he said, "Hey how come the boys never call me?"

Beckett didn't even bother to respond.


Beckett was getting ready to go into interrogation when the captain's door opened, "I just wanted to let you know detective I will be watching this interview." Beckett nodded.

"You ready Castle?"

"I think I'm just going to watch this one," Castle decided hoping to use this opportunity to slip the letter onto Gates' desk.

Gates and Beckett walked to the interrogation room. Castle just needed Ryan and Esposito to leave so he can sneak into her office. He was lucky, shortly after Gates and Beckett left; the boys went to the break room to grab a cup of coffee. Castle looked around to make sure no one was around. Just as he was about to go in when he heard, "Castle you want a cup?" Castle spun around and saw Ryan's head poking out of the break room.

"No. I'm good just going to head over to the interrogation." Ryan nodded, ducking back into the room.

Castle looked around one last time making sure no one could see him. Confident that the coast was clear, he quietly opened the door took four steps in careful not to disturb anything, put the letter on her desk, and then left.

He walked into the viewing room and stood next to Gates. She looked at him out of the corner of her eye and could tell he was up to something but didn't know what. She knew it had to do something with what she saw the other morning. Did they really think she didn't know earlier? She had her suspicions but, she has to admit, it's nice have Castle behaving trying to stay on her good side.

On the other side of the mirror sat Beckett across from Diane.

"Look, Diane, I know you had a fight with Emily last week. Why don't you tell me what it was about?"

"I don't know what you're talking about."

"Oh, come on don't play this game."

Diane just sat there. She wasn't going to talk.

"Look right now it doesn't look good for you. If you want this cleared up just tell me, where you were before you found her body."

"I'm a pilot, I was coming in from a flight. After I landed, I went straight to her house. You can check my flight records."

"Now why don't you tell me what you were fighting about?"

"I want to talk to Victoria. In private." Beckett looked to the mirror, she heard Gates tapping on it saying it was okay.

Beckett, Diane and Gates walked into her office. "Okay, Diane, you got your wish. Now, tell me why you guys were fighting."

"I didn't kill her, nor did my husband," she said, ignoring Gate's command.

This got Gates' attention, "Why would we think that?"

"Because of what I'm about to tell you. You cannot tell my son."

"I will not keep secrets from him, however, I am legally not allowed to discuss details of the case so what is it?" Gates exasperated. Why was she stalling?

"She told me she had slept with my husband."

Beckett saw Gates tense up; she didn't want Gates to do something she'd regret. "Is that all she told you?" Beckett asked, sensing there was more to the story.

"No, she told me he-he was the father to one of her kids. I believed that he slept with her but, I not that he fathered one of her children."

"Why would she lie about something like that?" Gate interjected.

"Look, Detective Beckett, you don't belong to my circle," Diane responded with a snobby tone. Gates rolled her eyes at that statement because Diane was always shoving her money and status in her face. She couldn't accept that her son married a workingwoman and that Gates didn't want to live her life style. "You don't understand what living in the high class is like. People are jealous over the simplest things, they will do anything to create a scandal to bring someone else down."

"That may be true but that doesn't explain why she would tell you, if she wanted to get you caught up in a scandal, why would she have included herself?"

"I don't know why she told me. All I know is that she did and that, to my knowledge, there was no truth to it," she stated before continuing in an acidic, tight voice. "I know we have our differences, Victoria, but I do not appreciate being dragged down here like a criminal. We are family, whether we want to be or not, and I expect a little more respect and loyalty from you."

"Diane," Beckett intervened. "Captain Gates didn't know you were being brought in for questioning. She put me on this case for a reason. If you want to know what happened to your friend, then let me do my job." With that, she turned and walked away.

"I do not know how you guys work around here, but I do not appreciate being talked to like that. I expect there will some sort of repercussions."

Gates nodded and sent her on her way down the elevator.

"Detective a word," Gates said in her usual terse way to Beckett on her way back to office, Beckett entering right after her.

"Sir, I'm sorry. It was unprofessional and it won't happen again," she said as soon as she closed the captain's door.

"No need detective, it was good seeing her chewed out like that. You can go." Gates gave her a little smile and pointed to the door. Beckett thought she heard Gates mumble something about if she were her husband she'd cheat on Diane too.

They wouldn't talk about it but they knew that that Beckett stepping in was her showing her loyalty. Cops weren't ones to sit around and share their feelings, they showed it through actions, actions like the one Beckett just did.

A/N: So the next part is where the killer is revealed. Any guesses on who?