My first Alex rider/NCIS crossover

Updated: giving thanks to the elusive shadow they were a big help.

Disclaimer: I own nothing. Meaning all rights for Alex Rider and NCIS belong to the appropriate people/companies.

It was just like any other day at NCIS headquarters for Gibbs' team. The team was typing away on their computers, checking emails, completing paperwork, all that boring stuff that came with having a government job. But getting to carry a gun is a perk that is never forgotten. So when Gibbs walked into the bullpen, the team was alert as to the usual routine.

"Gear up, got a dead marine in a park." Gibbs called out and the team grabbed their bags and headed to the elevator. Once they got to the crime scene, things stopped being a routine case. The killer was still there, watching them work the crime scene from the other side of the police tape.

McGee and Ziva were taking pictures while Tony was doing interviews.

"Now what do we have today?" Ducky said to no one in particular as he came to the corpse. The departed was on his back with a single gunshot between the eyes. The whole crime scene was a gazebos in the middle of a park in downtown D.C. "Oh my, single gunshot to the head is most likely cause of death, Gibbs."

"Time of death, Ducky?" Gibbs asked.

"About six hours ago, so around 3:30 am." Ducky answered.

"Yeah, and there were no witnesses or cameras, boss; the crime was called in by a jogger around six forty. She said that she found him after thinking he was asleep, then she found his dog tags and called the police." Tony reported after interviewing the jogger.

"McGee, got an ID yet?" Gibbs sipped his coffee as Ziva and Tony were taking pictures.

"This is weird, I can't get prints off of him, but his dog tags say Matthew Callaway." McGee said puzzled as he looked through the database.

"Okay, David, where do you think the shooter could have been positioned?" Gibbs again asking all the questions.

"Well since he was standing about there," She pointed to where he would have been standing next to the railing of the gazebos. "So the shooter would have been in the direction of those tall trees; be perfect concealment." There in the direction she was pointing, a brown haired young man was watching them while leaning against one of the trees. Ziva did not see him there earlier, so she took it upon herself to talk to him. As she walked away she heard Gibbs ask more of McGee. The young man seemed to be watching her as she walked over.

"Hello, I'm NCIS Special Agent David, can I ask you a few questions?" He shrugged. "Okay, did you happen to see anything?"

"I showed up after you did, who's dead?" He seemed extremely calm, and still bored.

"I don't think I can give you that information as this is an active investigation. But he is in the military."

"You can tell me, I'm enlisted too, may have seen him at the training base once."

"His name would be Matthew Callaway, did you know him?"

"Of him, yeah. I saw him around, kept to himself, good shooter, decent fighter. Didn't pick fights with people, though I've only been at the base for at most two months."

"Did he have any possible enemies?"

"I don't know, he barely mingled, so I didn't see how he could have made enemies."

"I may need you to come in for an official statement, may I have your name?"

"Ian Hunterson, nice to meet you Ms. David."

"As to you, may I ask how old you are? You just seem young that's all."

"That's perfectly fine, though some of my friends think I look older than I am. I'm nineteen."

"Already in the military?"

"My family died serving so I wanted to honor them by doing my part."

"That is very noble of you."

"Ziva! What are you doing over here?" Gibbs asked as he walked over.

"I was getting a statement from this young man, Mr. Hunterson this is Special Agent Gibbs, Gibbs this is Ian Hunterson; he knew of Callaway from training." Gibbs and Ian shook hands, Gibbs noticed how the kid looked like a real hard-core soldier.

"If that is all, I will come by later for that official statement." Ian turned to leave but Gibbs grabbed his shoulder.

"No need, we have room in the car and we can take you over now." Gibbs felt the young man flinch on contact, then become rigid.

"It's fine, I will come down later, I have things to do first."

"I insist, please come with us." Gibbs said as a command, since the kid's a soldier he expected the kid to obey.

"I insist that you let me go, I have a lot of people that will warn you to keep your distance."

"A trouble maker?"

"More like trouble beacon, now let me leave."

"If you're in trouble then we can help."

"No you can't, little navy cops can't help." In a blur Ian swung around and punched Gibbs square in the jaw. Gibbs was on the ground before he even could comprehend what happened. Now Ziva was trying to refrain him, but he seemed to have the upperhand. He seemed to be on auto-pilot as he fought until Ziva got a lucky shot to the temple rendering him unconscious. Meanwhile Tony and McGee stood by the gazebo making sure nothing else happened.

Before, when he first saw the team show up he knew that whoever investigated would eventually connect it to him, more or less because he was asking for trouble by hanging at the crime scene. He, for some unknown reason, enjoys threatening or pissing people off, like employers, enemies, K-unit, and the rest of them.

After talking to Ziva David, who she recognized as daughter of the Director of Mossad, Gibbs was insisting that he came with them to NCIS HQ. When Gibbs wouldn't release his sore shoulder, he punched him hard enough to bruise his jaw, but not hard enough to break it. Ziva was in action to stop him, but she was not the most challenging that Ian has fought. Still she was fast like those trained by Mossad, somehow she got a lucky shot to knock him out, causing him to crumple to the ground, while down Ziva cuffed him and helped Gibbs up.

"That was very strange." Tony said.

"For once, I couldn't agree more with you Tony." Ziva said.

Ian stood there in the Interrogation room looking at the glass that he knew was one-way, so he had people watching and recording him in the room, being who he is, he could tell he was creeping out whoever was on the other side with his cold silent stare, so he gave a cold smirk. And when he heard a faint open and closing of a door, knowing it wasn't his, he was gonna freak them out even more.

In the observation room, Tony, Ziva and McGee have been watching this kid stare at them. He had brown hair just long enough to cover his ears and touch his green eyes, they could tell he had his right ear pierced since he wore a gold stud, he was well-built as they saw his fairly large biceps under his long sleeve shirt and sweatshirt that lacked the baggy sleeves so it was more of a t-shirt. Tony found it creepy when the kid smirked, like he knew they were in there. Then Gibbs came in and joined them watching the kid, who amazingly took out Gibbs with one punch and was equal with Ziva.

"How long has he been like that?" Gibbs asked.

"Since he was put in there, hasn't sat or evened moved, been really calm and creepy." Tony answered.

Gibbs left the room. The kid smiled and turned to the door on his side.

"How did he know he was coming?" McGee asked.

"This is gonna be an interesting show." Tony said.

Thank you very much.