Title: The Original Sin

Sumary: Elliot and Olivia struggle to save their failing relationship as try to catch a serial killer before he strikes again.

Disclaimer: I am not Dick Wolf, therefore I do not own anything apart form Agent Wallace

Notes: There's only one thing I really need to know, Agent Wallace - when you picture him in your minds eye - he's Denzel Washington, this story came about from a "Who would you like to see on SVU" thread.

Thank you so much to everyone who has followed Consequences, it has been an amazing story to write and I'm so sad it's coming to it's end but as it is I want to start this one, now you know me so it takes me a little while to get where we want to be, let's just remember that! X

Olivia yawned as she sat at her desk, it had been another long night. They'd lost another child to the same killer and she couldn't sleep, every time she closed her eyes the little faces of the lost children flashed through her mind. Casey Thornton had been missing for three days, that meant they only had three days left before her body would turn up in a national park, a different one every time. He always overlapped; Olivia prayed that the children weren't together, the thought of them bonding the forcing one to watch as the other was killed made her feel physically sick.

Jordan Jones has been found today, the eight year old little boy had been snatched from a play park, like all the other children. He'd been missing for 6 days and was found by Elliot Stabler who had run himself into the ground, convincing himself that this was the child he was going to save, that this was the child they would catch him on, the child that would be saved from the vile monster, the child who would not be shot from behind, hands tied and blindfolded.

Olivia had watched as he beat the crap out of the punch bag, struggling to hold it still, scared to reach out to him, to try and ease his pain, so instead she hid behind the heavy bag struggling to keep up with his violent punches.

"Olivia, Elliot."

Both she and Elliot looked up as Cragen walked towards them.

"I've just had a call from Dean Porter, they're sending one of the F.B.I's agents down to help with this case, they've dealt with this perp before and they think that working together is the best way to go with this."

"Oh so they just walk in, do nothing and take the credit?" Elliot asked, his mood hadn't lightened at all.

Olivia did agree with him, but she knew her opinion wouldn't matter, it wasn't a suggestion it was a command.

"Nice to see you think so highly of us," all eyes turned to the well built man stood in the doorway. He was mid forties with dark skin, wearing a black suit. He walked into the room towards Cragen, "Charlie Wallace," he held his hand out to the older man.

"Donald Cragen, this is Detective Olivia Benson and her partner Elliot Stabler," he gestured to the two detectives.

Olivia gave him a polite nod while Elliot simply glared.

"Okay, so what have you got for me?" he asked, "I may as well start taking the credit right away?" he asked smiling at Elliot.

Olivia looked over to her partner warily, this was the last thing she needed, Elliot was ready to blow and in comes this guy. So she'd spend the rest of the investigation running herself into the ground as always with the added extra joy of stopping Elliot from beating the crap out of the cocky F.B.I guy. She couldn't remember his name, so cocky F.B.I guy would have to do.

"So far we have nothing, no leads no witnesses, no DNA." She told him, trying to remember his name.

"That's helpful," Wallace sighed picking up the case file that was in front of her.

She was about to react to his comment when Elliot stood up.

"What have you got?" he asked getting a little too close to the other man.

"You wanna back up?" Wallace smiled at him, it was official, the guy was an ass and Elliot was going to kill him, great!

"You don't come in here and act like we're your minions you get that?" he asked turning and walking away.

"Well isn't he a ray of sunshine?" Wallace turned to Olivia as Cragen shrugged behind him.

"He's had about 6 hours sleep in the past week," she hated this guy already, he was a jerk.

"Then he should go home, if he can't hack it." He turned to Cragen, who was about to speak when Olivia cut in.

"He can hack it, and that's not your call."

"Don't tell me he has anger issues, you run around making sure he doesn't kill people and cleaning up his mess? Good girl" he rolled his eyes.

She turned to Cragen her eyebrows raised as far as they would go.

"Agent Wallace, if you're here to piss my people off then you can leave-"

"Relax Sir, I'm trying to get a feel for your people," He said emphasising his last two words. "He's pissed off? Good he'll work twice as hard-"

"He doesn't need to-"

"Detective, if you're going to jump in every time I mention him to tell me how great he is then you may as well just not speak at all cause so far that's all I've heard." He walked away leaving Olivia stunned.

"Well they really picked us a good one, despite his words..." Cragen tried to phrase his words carefully, "Don't let Elliot kill him." He sighed.

"He'll have to get in line." She mumbled softly under her breath.

**

24 hours had passed and Elliot was unbearable, even by her standards, granted Wallace (she had now learnt his name, but she preferred cocky F.B.I guy) was the biggest jerk she had ever met, she was sure he was just one step away from patting her on the ass and asking her to run along. Elliot had simply grunted every time she spoke to him and it was starting to grate on her, he'd been pretty unbearable even before the case and she had no idea why, but as usual he was picking it out on her.

He'd slung a few insults about her dedication to the job when she told him that she was tired and needed sleep, after being awake for 24 hours straight. She'd promptly walked away, yet again not addressing his attitude, just letting him get over whatever issues he had. Now half an hour later she was lying in the crib unable to sleep, the case details rolling through her mind.

"Benson!" the door flew open and she shot up "We've got something!" Wallace yelled before running out again.

Olivia gathered herself and followed him, hoping that Casey Thornton had been found safe and unharmed but knowing that it was unlikely.

**

Elliot stood silently, the blood on the walls sending a shiver down his spine. He looked around the dark and dingy room and felt completely overwhelmed by the despair that threatened to engulf him. How many children had been? There was a bucket in the corner and the smell of urine was overpowering. There had been no sign of life when they arrived here ready to save the victim and arrest the vicious perp, but a sighting of a struggling young girl and a man had send them to the right place.

"CSU are gonna be here any minute, try to test the blood – he may have left DNA in here," Wallace informed both Elliot and Olivia.

Olivia nodded as she slowly walked towards the one colourful thing in the room, she struggled to compose herself as she saw the little dolly, once beautiful, now covered in blood.

"Don't touch that."

Olivia turned to him, had he really told her not to touch evidence? As is she didn't know?

"She knows what to do," Elliot's voice full of aggravation.

"I know she does," Wallace turned to him and the two held each other's stare.

Olivia turned her gaze from Wallace to Elliot, the testosterone in the room threatening to overwhelm her.

"Uh, this belongs to Anna Parks, her mother described it to me when she was taken," she spoke trying to ease the tension.

Elliot turned to her and held her gaze for a few moments before walking out.

"The youngest victim?" Wallace refused to acknowledge Elliot's exit.

Olivia nodded. "She was 5..." she could usually hold it together with these cases but she had found Anna, her tiny body battered and bruised. She had been the one to tell her mother, to hold her as she sobbed and clung to her.

"It's hard." Wallace spoke softly, trying to offer an olive branch after turning up all guns blazing.

"I can take it," she told him, following her partner.

**

Elliot slammed his hand against his locker,

"Are we at this stage again?"

He heard Olivia's soft voice.

"Go away Liv, I'm not in the mood."

"Are you in the mood to be kicked off this case? Cause that's the way you're going."

He shook his head, sitting down on the lone bench.

"I know this is getting to you El-"

"You know I said I'm not in the mood for one of your pep talks, so just leave me alone," he didn't even bother to look at her as he turned away from her.

"Sooner or later you're going to have to find out exactly what it is your angry at, I'm not going to put up with this for much longer-"

"Stabler!" Wallace burst in the door looking as tired as she and her partner did, "You walk out on a crime scene like that again I'll make sure you're off the case-"

"You're not in charge of the God Damned case!" Elliot stood up, suddenly both men were chest to chest, breathing deeply.

"I've had just about enough of your attitude Stabler!"

"So do something about it?" Elliot spoke through gritted teeth,

"Are you two finished?" Olivia asked, folding her arms wondering how she wasn't drowning in the testosterone,

"Stay out of the Benson," Wallace pointed at her, warning her.

"Don't talk to her like that," Elliot told him,

"What you're the only one allowed to treat her like shit?" Wallace spat, further annoying Elliot. "Seems to me like you have some serious problems when it comes to women, mother issues?" and that was it, she had no idea who hit first but she assumed it was Elliot, suddenly the two men were on each other only moments away from kicking the living crap out of each other, she ran forwards stepping between them, struggling to push them apart.

Neither one of them stopped until she hit the lockers, neither one of them sure which one had struck her

"Liv!" Elliot gave Wallace one last shove before running to his partner, a bruise already forming on the side of her jaw.

"Get off me," she pushed his him away, "You two wanna beat the crap out of each other just do it, I'm done!" she walked out angrily, slamming the door behind her.

Guilt completely overwhelmed Elliot, had he hit his partner?

"You pull a stunt like that again I'll have your badge," Wallace walked out, unwilling to accept any blame, Elliot had hit him first he simply reacted in self defence and it was as simple as that.

So what do you think? x