A/N: The breaks between my stories seem to be getting shorter and shorter nowadays. This time, the story's the beginning of a triple crossover trilogy between CSI:NY, NCIS, and NCIS: Los Angeles. I put this solely in the CSI:NY fandom because I can't place it in a triple crossover section, and anyway, the majority of this story takes place in New York. The timeline is somewhere during Season 6 of CSI:NY, and Season 7 of NCIS.

Cross-Country Case: Urban Murder

Prologue

10:00, October 28; NCIS Headquarters, Washington, D.C.

It's in a state of chaos. Or rather, one particular floor is in a state of chaos. Which floor is that? The floor on which the team led by former Marine and Special Agent Leroy Jethro Gibbs resides.

"McGee!" Gibbs called to the computer expert over the excited chatter that pervaded the room. "Tell me you have something on our missing Marine."

Timothy McGee looked up from under his desk, banging his head on it as he did so. "Ouch – yes, boss, I do have something." Ignoring the snickers coming from Special Agent Anthony DiNozzo, McGee typed up something on his computer, making it show up on the large LCD screen that the rest of the team were staring at.

"Lt. Col. Leah Jasper checked in at the Marriott Hotel in New York two weeks ago for her vacation," he said, as the official records of said hotel popped up on the LCD screen. "She notified her superior, Col. James Sheridan, that she would be away for ten days on her leave of absence. Sheridan filed a Missing Persons report yesterday when she didn't show up for Corps duty at the appointed time. He called her several times, but she didn't pick up. As far as he knows she hasn't returned to Washington… "

"Which means she's probably still in New York," Gibbs finished.

"According to her track record, she's never missed a day of work before," supplied Junior Agent and newly naturalized American citizen Ziva David. "Which leaves either…"

"Kidnap or murder," Gibbs completed.

Just then the door that led to MTAC, the communications room, burst open to reveal Director Leon Vance.

"Gibbs, Sheridan just got a call from Leah Jasper's cell phone, but it isn't her. The MTAC agents are tracking the call as we speak."

Already starting up the staircase, Gibbs said, "I want to talk to whoever it is."

"Gibbs, it's Sheridan's call…" Vance began.

"And it's my team who's investigating this case," Gibbs told him calmly as he came face to face with the director. He proceeded to enter MTAC without waiting for a reply from Vance. Wordlessly, he extended his hand, palm up, for the cell phone Sheridan was talking into.

"…all right, listen, we're not getting anywhere with this conversation, so I'm passing you over to one of my colleagues," Sheridan said into the phone, and before the person on the other line could protest, he pressed the phone into Gibbs' open palm. Gibbs put the phone to his ear but remained silent.

"Hello?" a female voice on the other end said nervously. "Is anyone there?"

At last Gibbs said, "This is Special Agent Leroy Jethro Gibbs of NCIS. Can I ask what you're doing calling from a cell phone that belongs to a missing Marine?"

There was a stunned silence on the other end. Then the woman said, "Special Agent Gibbs, I'm Detective Lindsay Monroe of the New York Crime Lab. I believe we've found your missing Marine."