Don't Leave Me

A/n: Before I get any further into this one, I should just tell you all that if you have not yet read my other story, "Drive," you should do that before continuing with this one. Some things happened in "Drive" that don't follow the show AT ALL and you'll need to know that to understand where some of the people mentioned here come from.

Olivia just stared at her. She could see Nico in her. Her eyes, even down to the way she held her mouth when she was nervous. "Kaitlyn?"

"Yeah. Kaitlyn Castigari." Olivia closed her eyes, more to stop the tears from coming than anything. "I shouldn't have come. I'd better go. He'll get mad if he finds out where I was," Kaitlyn said, getting up.

"Wait, please. How is he?"

"Who?" Kaitlyn asked.

"Nico. Your dad."

"I wouldn't know."

"But you just said…" Olivia began. Kaitlyn looked at Olivia and knew the woman wouldn't give up.

"Nico Castigari is in Antwerp, Belgium. He's been there for the past three years, as far as I know. He sold me to an American before he moved there," Kaitlyn said, sitting down. Olivia looked at her, more shocked than anything. Kaitlyn sat down in a chair and buried her face in her hands. "I shouldn't have said anything. I should have just kept my mouth shut, like he told me to."

"No, Kaitlyn. You did the right thing," Olivia assured her. She gently rubbed her daughter's back. "What's his name?"

"Matthew. Matthew Davidson. He's a stockbroker," she said. "I'm scared."

"You don't have to be afraid of him anymore, Kait. We'll arrest him, make him pay for what he's done to you," Olivia said. Kaitlyn glanced down at her watch.

"I have to go," she said, standing up quickly. "If I'm not home on time, he'll come looking for me. I can't let him find me here.

"Kaitlyn, you don't have to go back to him," Olivia told her. "You're my daughter, Kait." Olivia watched as the girl stared at the door, like she expected Matthew Davidson to come barging in. "Has he ever hurt you, Kaitlyn?" Kaitlyn didn't look away from the door, but rolled up the sleeve of her shirt, exposing several thin bruises, as well as a larger one that appeared to be a hand. "Okay. That's what I needed to know."

"What's going to happen now?" Kaitlyn asked.

"Matthew will be arrested. You'll have to make an official statement. Once we've investigated and we have the evidence we need, he'll be charged and it'll probably go to trial," Olivia told her.

"What about Nico?" Kaitlyn asked.

"They'll get a warrant for his arrest, and he'll be extradited from Belgium. Once he's in our custody, the proper charges will be filed against him, as well," Olivia said. She smiled. "I'll go get Elliot, okay?" she asked. Kaitlyn nodded. Olivia left the room and motioned to her partner, who was sitting at his desk. He got up and came over.

"What's up?" he asked.

"I have to go get something, and I need you to get this victim's statement," she said. He looked at her apprehensively. "I'll explain it all when I get back, I promise. And don't call Social Services, okay?" Elliot nodded.

"Okay. What's the situation?"

"She says her father sold her to a man named Matthew Davidson. He's been beating her," Olivia said. Elliot's eyes widened.

"What kind of sick freak…"

"There's more to the story, El. I'll explain it when I get back," Olivia said, before walking quickly out of the room.

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Olivia carefully lifted the lid of the old cardboard box. It had been years since she opened it. The wear was evident. For a long time, she hadn't been able to go a day without looking at the precious articles contained within. After she'd given up hope that Nico would return, she'd pushed the box into the back of her closet and forgotten about it. Now, she anxiously searched for the piece of paper that would give her daughter back to her. It was just a matter of finding the birth certificate.

She quickly cast aside the pictures and clothing items, searching frantically for that certificate. It was near the bottom, just above the ultrasound pictures. She left everything on the floor and rushed out, back to her car.

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Olivia walked back into the squad room, Kaitlyn's birth certificate in hand. O'Kelley came up to her. "Cragen's been looking for you. He's pissed," she said. Olivia nodded and walked towards Cragen's office.

"You wanted to see me?" she asked.

"Where the hell have you been?" he asked. Olivia held the birth certificate out to him.

"Getting this," she said. He took the paper and opened it, scanning its contents.

"You're kidding me, right?" he asked, shocked.

"No, sir. She's been missing for fifteen years." Olivia closed the door, knowing Don would want the whole story. "I had her while I was in college. Her dad took off with her when she was six months old. I filed missing persons reports, but they never found anything."

"You realize that I have to take you off this case, right?" he asked. Olivia nodded. "Elliot and Cassidy took her to Warner's lab. They have to document all of the abuse." He looked at her. "If you want to, you can go. She needs you more than anything right now."

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Kaitlyn sat perfectly still, her eyes closed, as the doctor took pictures of her bruises. She hated hospitals, and even though she wasn't in one, the lab she was in was close enough for her. "Okay, you can put your shirt down now," the doctor said.

"Can I go?" she asked.

"Yeah, go ahead," Warner told her. Kaitlyn left the room quickly and sat down on a bench outside.

"Are you okay?" Elliot asked, coming up and sitting next to her.

"I don't like doctors," Kaitlyn told him. He smiled.

"Who does?"