So here's the first chapter of today the next one will be up soonish i'm thinking. Now don't kill me when you read the ending, so read and if you like review :)

Disclaimer: No I don't own it for the simple reason if I did it would have been written a lot better.

It had been a week since they had found the first body and since then Tyson had killed two more people. He had written letters along with them claiming that Kate wasn't trying hard enough to find him. He hadn't been in contact with her until she walked into the precinct that morning and Karpowski had called her over.

"Hey Beckett, someone just called line one."

Kate walked over to her desk and picked up the phone. "Beckett."

"I'm very disappointed in you."

She froze instantly. "What do you want?"

"Why I thought that would have been obvious by now."

"Well I'm sure if it was I would have realized by now."

"I want you." He grinned down the phone.

"Where are you?"

"Now why would I tell you that? It would spoil the game."

"I'm not playing a game Jerry."

"Oh but I am."

"Well it would go a lot faster if I knew where to find you."

He laughed down the phone. "May I just say you are looking very nice today."

Kate looked around the bullpen but couldn't find anything.

"Do you really think I'd be in the building? I'd be walking into my death sentence." He paused for a moment and the elevator dinged. "Oh look here's the writer."

Kate turned slowly and watched as Rick walked off the elevator and started to walk towards her. She turned and looked out of the window but found nothing.

"Very funny game you're playing but you're forgetting one thing."

"Really what's that?"

"I found you once and I will find you again."

Tyson smiled. "That's better detective, there's the woman that I want."

"Well don't worry because when you get me I will kill you."

"You seem so sure of yourself."

"Really? That's because I am."

She hung the phone up before he could say anything and Rick stood next to her. He looked at her for a few seconds.

"Who was that?"

"Jerry."

"He rang again? What did he say?"

"It doesn't matter because I'm going to find him."

She strode towards the elevator and Rick shouted here.

"Kate? Where are you going?"

"He's bugged the precinct."

An hour later by the time that Ryan and Esposito had came by tech guys were sweeping the bullpen.

"Hey Castle what's going off?"

He stared at them. "Tyson."

"What? He's playing hide and seek in the bullpen is he?"

"No he bugged it."

"How do you know that?" Ryan asked.

"He called Beckett again this morning, she's convinced he's bugged the place."

"Where is Beckett?" Ryan was looking around for her.

"Oh someone came in and claimed that they saw Tyson going into an abandoned building, she's in the interrogation room talking with them now."

One of the tech guys came to meet Rick and showed him one of the receivers he had found.

"We've done a full sweep of the place and found these almost on all the desks. There was also a small webcam in the ceiling but that's about it."

Rick nodded his head and then headed for the viewing area to see how Kate was doing with the interrogation. He walked through the door and put his hands in his pockets, he had a bad feeling when he woke up and now this way why. Kate was just finishing up when Ryan and Esposito walked in.

"You are almost certain this was the person you saw?" Kate asked.

"Yes I'm positive about it."

Kate nodded and stood up, she walked to join the guys and dropped the files on the desk.

"So according to our witness there she says that for the last week she has seen a man matching Tyson's description entering an abandoned apartment building. It's about half an hour away so I'm going to get a team together to search it."

Ryan and Esposito nodded while Rick listened to her. Even though he wanted to tell her not too go he couldn't, she say that he was being the stereotypical guy and trying to protect her even though he was.

"Kate?" He called her as she was walking out the door.

She turned around and looked at him. "Yes?"

"Please don't go and look for him just let someone else do it."

"I can't do that."

"Why not?"

"Because I have to find him."

"I want to find him as well, but what if he has a gun?"

"Castle I've dealt with more criminals than most people, I can handle myself."

"I know you can but please for me."

She stared at him and she shook her head. "I can't, I'm sorry. Besides he might not even be there."

"So you're going to risk being shot because he might not be there."

"If you don't like it then go home." She turned around and walked out the room leaving Rick standing there watching her leave. He hoped that by the time they had gotten him she just understood he was doing this for her.

He headed to see Ryan and Esposito who was standing at their desks.

"What did you say to Beckett? She didn't seem happy."

"I didn't say anything I just asked her not to go and search that building."

"Oh wrong move bro."

"Yeah it might have been but I'm only looking out for her. Ryan would you let Jenny go somewhere if it wasn't safe?"

"Probably not."

"Exactly that's all I'm trying to do. Keep her safe."

"You know what Beckett's like. A woman working in a man's world."

"I heard that you know." Karpowski said.

"Oh Karpowski I didn't see you there." Ryan looked at her.

"Yeah sure you didn't."

"See they can't win and it seems we can't either."

An hour later both Ryan and Kate's car's pulled up outside the apparent apartment building. Kate had rode up on her own seeing as her and Rick still weren't talking. So instead of making things worse for himself he had decided to catch a ride with Ryan and Esposito. A van pulled up behind them and the group that Kate had assigned piled out.

"Okay so you know what to do." Kate said once they had all gathered around her car. "Sweep the building if you find him I don't want him armed."

They all nodded before going into the building. Kate opened the boot to her car and got out her vest before putting it on. Rick walked up behind her and watched carefully.

"What?" She asked turning around. She was still annoyed at him.

"I just wanted to make peace with you before you went in there." He said. "I understand what catching this guy means."

She nodded her head watching Ryan and Esposito walking into the building. "I shouldn't have had a go at you and for that I'm sorry."

"Now let's go get him." Rick smirked but Kate stared at him.

"There's no chance I can get you to stay here."

"Oh so now who wants me to stay."

Kate stared at him and then back to the building. "Well what if he's not in there and while we're in there he cones but we don't know."

"Good point. But that's what that handy guy in that van is for." He pointed to the van across the road with the men sitting in it.

"Fine but you stay BEHIND me."

"Understood."

They both headed in and looked for the floor that Ryan and Esposito were exploring. Rick stayed behind Kate as she headed through each of the doors. After each one she felt her spirits dying a little more thinking that he wasn't here.

They got to the sixth floor and all four of them split up, Kate pushed one of the doors opened and started at it. She looked around and had a feeling this was the apartment she walked to one of the rooms and froze. Rick who was behind her stopped to see what she was staring at.

"Wow that's creepy."

They were staring at the wall Jerry had made, there were pictures of Kate as they scanned the wall there was no trace of anyone else. Ryan and Esposito walked through the door to see them standing.

"What did you guys find?"

"He's turned into a stalker." Rick said.

Ryan and Esposito came to stand near them and looked at all the photo's. "Wow." They both said.

Kate moved and headed to check the rest of the apartment. Each door her heart quickened a little as she opened it expecting to find Tyson sitting there waiting for her.

"Looking for me detective?"

Kate turned and standing there in the doorway was no other than Jerry Tyson. All three men turned to stare at him and nobody made a move.

"Tyson." Kate said.

"Well I must say I'm pretty sad that my game has ended now. You were better than I thought." He clapped slowly and made his way into the room.

"Take one more step and I swear I will carry through with my promise and kill you."

"I like a woman who takes charge." He smirked, he looked at her fully at that point. "Well you certainly have changed since I saw you last." He tried to step into the room again but Kate reached for her gun.

"I mean it." She said raising her gun and pointing it at him.

"Now why would you do that?" He smirked. He reached behind his back and bought something out. "Look I have one too." He pointed the gun to her and she tensed a little.

"Now I believe I can make the requests as well."

Ryan and Esposito both reached for their gun and pointed it at him. "Lower you weapon Tyson." Ryan told him.

"What do you think the odds are of me shooting Kate before you do?"

Rick watched the scene in front of him and had inched closer to Kate. Tyson watched him closely and then pointed the gun to him.

"I'd tell you boyfriend to stay still if I were you."

"Castle don't move another inch." Kate didn't take her eyes off Jerry.

Rick relented and held his hands up. Tyson smirked and then moved back to watch Kate.

"Now what I am going to do with you?"

"Well I'd have thought with all the planning you did killing those girls you would have thought of something as simple as what you wanted to do with me." Kate said.

"Oh I'd be careful if I were you. I wouldn't want this to accidentally go off."

"I wouldn't want mine too either." Kate said back.

"Do you know what I've learned something while I was trying to escape being caught." Tyson started. "It wasn't worth it, you know I should have just killed those two when I had the chance." He turned to look at Ryan and Rick at that point. "In fact I might just do that right now."

He pointed the gun at Rick and he stood still.

"Now why would you do that Jerry?" Rick asked. "What's that going to do?"

"It would cause her pain." He said meaning Kate. "And that's what I want to do right now."

"Really think about it, if you shoot me they are going to shoot you."

"Maybe that's what I want." Tyson said. "I'm not going back to prison and I'm not going to go back on the run so it seems like the best idea so far."

Tyson looked straight into Rick's eyes. "Goodbye Rick."

"No wait!" Rick said. "Why shoot me? That's not what you do."

"Well it's time for a change."

Kate froze as a shot rang out, she was afraid to see if he had shot him. She turned her head to see Rick stumble backwards and Jerry smiled. Kate immediately turned round and fired another shot out which hit Tyson on his lower leg. He stumbled to the floor and Ryan and Esposito ran to disarm him.

Kate turned and saw Rick on the floor, she ran to him and kneeled beside him. "Oh my god."

He stared at her and coughed lightly.

So there you have it :) Now remember please don't kill me...yet anyway...because if you did then I can't get the next part up.