A/N : Thanks again to everyone that has reviewed, followed or made it their favourite. It's good to know that people are enjoying this. Still a long way to go so stick with me. Also, excuse me if I've got some of the areas and geography of New York wrong. Not living there and not having visited there yet I'm relying on maps.

Disclaimer : Castle is the property of Andrew Marlowe, ABC, all the talented writers of the show and not me. Having a go at steering these characters for a while is my idea of fun.

Castle, doing some research himself, hangs up the phone on the desk behind Beckett, turns in his swivel chair to face her and says, "So Ferry alibis out. That was the manager of the Foxy. He confirms that Ferry was there from just after 10 until dawn. He's got security camera footage showing him coming and going. He's emailing it over to you and all I had to say was that I worked with the NYPD and he was more than helpful."

Beckett, sitting at her desk studying the information on the monitor in front of her, responds, "Probably worried about his liquor license." She's annoyed that it looked like Ferry wasn't the murderer but she was going to take some consolation that she was getting him off the streets and away from young women with the charges over the photos. As she feels Castle move closer behind her she starts reading out the information on the monitor in front of her, "So the missing person's report says nine months ago a Julie Carmody, twenty years old, was reported missing by her brother, Sam."

Castle gently brushes aside the long brown hair at one side of her face and places his chin on her shoulder, their cheeks touching, to look at the screen. She glances at him and with a smile continues, "According to her brother she came to New York a year ago with a friend to try her luck at becoming a model. After two months the friend gave up and went home. Sam was at college at Cal Tech studying computer engineering at the time and stayed in regular contact with Julie. Nine months ago he lost contact and reported her missing. Detectives from the 18th investigated but there wasn't any sign of foul play at her place. In fact it looked like she'd packed a bag and gone somewhere but there was no record of where. After that the case became just another one of the hundreds of unsolved missing person's cases in the city each year."

"Mr Castle!" says Captain Gates sternly as she passes by the pair of them.

"Sorry," replies Castle as he lifts his head from Beckett's shoulder and moves next to her so that he can still see the monitor.

Beckett, slightly embarrassed at being caught in an overt display of affection in the precinct, continues, "Sam turned up at the 18th a couple of weeks later and demanded they continue investigating. With no new evidence all they could do was give him want info they had and send him on his way."

"So Sam, determined to find out what had happened to his sister, drops out of school and moves to New York to try and find her. What about their parents?" asks Castle.

"Both died in a light plane crash two years ago back near their home town in Arizona. Left the two of them insurance money which is how Julie could afford to follow her dream to come to New York to become a model."

Esposito and Ryan join them, hand a file to Beckett and Esposito says, "Got the info on Sorizo. He's a college dropout from California, moved here about a year and a half ago. No job from what we can find and he's on the Fed's radar."

"What for?" asks Beckett, her interest piqued.

"Computer hacking! He's suspected in hacking several government and private company websites. No evidence to prosecute him but they have him on a watch list," supplies Ryan.

"Let me guess, he dropped out of Cal Tech where he was studying computer engineering with our victim?" asks Castle.

"Yeah, he dropped out of Cal Tech and while we can't tell if he knew Carmody there we know he knew him here," adds Esposito.

"How?" asks Beckett

"Carmody's financials. According to them our vic made two payments of five grand each to him during the last six months," replies Esposito.

Castle starts spinning his theory, "Add to that the tracking device that Lanie found in our victim and it looks like that our vic was running the whistle blower website and was paying his hacker class mate to do the hacking that was getting him tracked by the shadowy government agency."

"So where does the missing sister fit in?" asks Beckett.

"Maybe she'd been involved in some big government conspiracy, was disappeared, they found evidence of it and he was about to release it to the world which is why he was killed," continues Castle undaunted.

"Or there is a perfectly reasonable explanation why our vic paid him the money that has nothing to do with a whistle blower website," counters Beckett. "Anyway we'll find out when we talk to him. What about that supposed tracking device, did CSU find anything and was Carmody on the Fed's radar as well?"

Ryan looks at a file he is carrying, "CSU thinks it could be a tracking device but it could be something else, they can't be one hundred percent either way. It's homemade with the components available over the counter from any electronics store. FBI and Homeland don't have any record of having any interest in Carmody let alone tracking him like this."

"As the homemade nature of the device would indicate," says Beckett with a look at Castle to put that particular theory to rest. "And what about the SD card and the bullet Lanie pulled?"

"They can't access the info on the SD card. It's got some pretty sophisticated encryption software protecting it. The techs suspect that it's designed so that the card can only work on specific computers that have the right decryption key preinstalled," answers Esposito. "As for the bullet, nothing in the system on the gun that fired it other than it could have come from any number models of 9mm hand guns.

"So with the computers at his home smashed and anything of help that he might have been carrying taken by the killer we have no way of finding out what Carmody was trying to hide. What about a timeline for before the murder? Any idea where Carmody was?" asks Castle, not concerned at all that his latest theory was looking less and less plausible. He was used to it. He usually got the right theory in the end.

"He left the computer shop where he works part time at 6pm. His Metro card records have him taking a train to the 145th street station in Hamilton Heights arriving at 6:30pm and then nothing. Nothing to indicate how he gets to from there to where he is crushed at 2:15am," Ryan informs him.

While Ryan had been talking, Beckett had gotten up and started writing the information on the murder board, ending with the scant information of the timeline. Standing back and studying the board she says, "Espo, go and kick Ferry to vice, they can have the dubious honour of charging him and then get Sorizo and put him in interrogation for me. Ryan, get some unis from the local precinct to do a canvas around Hamilton Heights, see if they can trace Carmody's movements. Oh and chase up Tori on the registration of that van."

As Esposito and Ryan depart Castle gets up and joins Beckett at the board and in a puzzled tone asks, "What was Carmody doing in Hamilton Heights for all that time?"

"And what do his missing sister, an RF chip and an encrypted SD card have to do with it all?" asks Beckett in an equally puzzled tone.

A/N : After watching that funny video of Stana, Jon and Seamus doing the ice bucket challenge today plus the one of when Nathan did it I just have to say I'll be donating to The Ice Bucket Challenge #KissMyALS