A/N – Usual disclaimers apply I do not own NCIS etc etc. Also this is unbetaed so apologies for any mistakes.

This story just would not leave me alone, its AU and my first attempt at NCIS fic, so please review but flames will be laughed at. Updates will be hopefully every few weeks as I have other stories on the go.

Werewolves are accepted members of society and they follow both the rules of the human world and those of the pack, the various packs are ruled by a dominant wolf called the Alpha.

The Claiming.

Tilting his head back Gibbs released a mournful howl, he allowed his grief to sound out not caring if he was discovered. Mike Franks was dead, his friend and mentor had been murdered, although Gibbs knew deep within his very bones that his friend preferred to die doing the job he did best rather than waiting for the cancer that was slowly consuming his body to kill him. But still he could have helped his friend if only he had been quicker and realised exactly what Franks had planned.

Gibbs had held himself together not showing the depths of his grief until Cobb had been taken down, but now that Mike had been buried he felt he had could finally let go, he knew that his team were together so they would be safe until he was ready to rejoin them. Dropping down onto the ground, a naked Gibbs changed; the huge wolf shook itself and loped towards the back of the garden jumping the fence the animal headed into the woods.

Running faster and faster trying to outrun his grief and growing rage at the death of his close friend the silver wolf stopped and once again let an anguished howl sound out, ears pricked when other voices joined in the chorus. Looking around he realised he was in Anacostia Park, sniffing Gibbs recognised that a number of packs had claimed this territory as there own to share and defend, he was not worried, he would deal with meeting any other wolves as and when it happened.

Head tilting the huge silver wolf could scent deer, growling low he decided to hunt, he had not transformed into his wolf for such a long time that he decided that he would relish the freedom that this form allowed, silently he began to stalk his prey. Gibbs allowed his animalistic side full rein as he ran down the large buck, he snapped the majestic animals neck between his powerful jaws; he began to feed ripping and tearing into the flesh allowing his anger and rage over his friends death to transfer into his butchering of the large carcass. Raising his head he once again howled, his grief and rage still raw and painful. His head swung round as he heard answering howls getting closer, laying down Gibbs began to clean the blood from his fur, he would see what the pack would do when they found him. And if the Alpha was stupid enough to want to fight then all well and good, the wolf grinned blue eyes flashing at the thought of a good knock down dirty fight.

The twelve members of the Washington Police Department pack that had gone running on this night followed their Alpha, they could see a deer carcass and a wolf was lying near it cleaning its front paws, seemingly unconcerned by their presence. They stopped and waited to see what their Alpha would do to the stranger, he changed back to his human form unworried about his naked state.

"You are trespassing."