Title: Lost and Found

Rating: FR15

Summary: Gibbs gets some shocking news when the evidence in a current case points to someone he never knew to exist.

Characters: Gibbs-centric; Tim and Tony will be around, and Abby too. My new OC, Lena, is a main fixture. Gibbs' father, Jackson, will have a role as well. See my personal Canon file in my forum for a list of all of my OCs.

Chapter 1

Abby rushed back and forth in her lab as her Babies beeped. She was running a few tests at once for her silver-haired Fox, and she knew he'd be down soon to ask her what she'd found. They were working the case of a murdered Petty Officer, and the evidence had led them to believe he'd been murdered by a woman. Abby was presented with DNA evidence from the victim's clothing, along with other assorted goodies for her to process.

As she analyzed the results from Major Mass Spec, her computer beeped behind her, announcing the result of a DNA sample she'd been running. She turned around and looked at the results on the screen.

"This can't be right," she said to herself as she started to type. "I have to run this again." She started the DNA matching again, and it came back quicker than the first time. It came back with the same result. "This is impossible!"

"What's impossible?"

Abby turned around to see Gibbs standing there, holding a super-sized caf pow. She took it from him and took a long sip.

"I've run the DNA twice, and I get the same result."

"Which is…"

Abby stepped aside and let him look.

"Abby, how could it be my DNA?" Gibbs asked. "Are you sure you ran it right?"

"I'm completely sure! It was the only viable DNA sample I could get off the uniform!"

"So where does this leave us?"

"If it isn't you, than it's got to be someone you're related to," Abby said. "The test wasn't a perfect match for you. It only came back with one allele in common."

"What are you telling me, Abby?"

"The owner of this DNA is related to you, Gibbs."

"How is that possible? My Dad is the only relative I have within 1000 miles."

"I'm not sure. I can do some digging, if you'd like."

Gibbs was silent, staring at the DNA on the screen.

"Gibbs?"

"Yeah, Abby, look into it. Do not tell anyone about this. I want to know first."

"Of course, El Jefe!"

Gibbs turned and left the lab as Abby went back to her work. As he waited for the elevator, he couldn't help but wonder who she'd find. What were the chances that the DNA she'd get would be so close to him, especially since the only relative he had living anywhere close to DC was his father. His only other relative is an eccentric Aunt who lives in a nursing home in Stillwater. Neither of them could possibly be a murderer, and Gibbs himself was in the squad room at the time of the murder, with more than a dozen people to verify it.

So who the hell could it be, if it's not me, Jackson or Aunt Hattie?

"Boss?"

Gibbs came out of his daze to an open elevator, and McGee staring at him. He stepped in without a word, and McGee stepped out, bewildered. Scratching his head at Gibbs' strange behavior, he headed into the lab to join Abby.

"Hey Abby!" he said as he approached her lab table. "What are you working on?" he asked curiously.

"Nothing!" she said, lowering the screen from his view. "Absolutely nothing!"

"Come on, Abby, that was the worst lie ever. You can tell me."

"Gibbs told me not to tell a soul," she said, pretending to zip up her lips.

"He did seem bothered when I bumped into him at the elevator," Tim noted. "Is something wrong with Gibbs?"

"No, he's fine. This test is just, personal," she said.

"You're so bad at lying," Tim said with a grin. "Don't make me hack in to find out…"

"You wouldn't!"

"You know I could," he said, waggling his eyebrows.

"You're a big jerk, you know that, Tim?"

"I try."

She turned and brought up her DNA testing and research.

"This is the DNA test from the Petty Officer's clothes. I found a weird anomaly, and I'm trying to rule some stuff out before I discard it."

"Can I help out?"

"You're not even supposed to know!"

"He isn't even down here, Abby. He'll never know."

"All right, fine, you can help. But not a word to anyone, or I will kill you."

"Understood."

Abby continued her search.

"The DNA came up with one allele in common with Gibbs, which means—"

"The killer is related to Gibbs."

"Correct! What I'm trying to find out is who this person is, since the only relative he has is his father, who is obviously not a murderer."

"And Gibbs was in the squad room that night, with us," Tim pointed out. Abby glared at him. "But he obviously wasn't the murderer, so I'm not even going to consider him."

"So who is our mystery person?"

"Were there prints on the uniform?" Tim asked.

"A couple, but I'm still running them through—"

As she said it, Major Mass Spec beeped. She went and retrieved her data.

"I've got a fingerprint match." She put it up on the screen. "Meet Lena Summers," Abby said. "Age 45, married with one child, owns a Florist shop in DC."

"So, is it her DNA we have, and if so, how is she related to Gibbs?" Tim asked.

"There was one allele in common." It hit her, and her eyes went wide in realization. "Oh my, I think she's Gibbs' sister!"

"Sister? He doesn't have any siblings."

"She's probably a half-sister, Tim. There weren't enough alleles in common for them to be full siblings."

"We can't prove that it's definitely her DNA, unless we get a physical swab from her," Abby said. "Would you mind calling El Jefe and tell him to come down, Timmy?"

"And let him find out that you told me before him? No way!"

"Fine, I'll call him."

Abby picked up the telephone and dialed Gibbs' extension.

"I've got something you might need to see, Gibbs."

TBC…