Hi Everyone,

This is a little author's note before the beginning of my story. I don't mean to step on anyone's toes but someone else has already begun writing a story like this. I used their idea but it will be completely different and I will most certainly update regularly. I've been waiting for a cross-over between criminal minds and pretty little liars for ages and since the other story is not being updated fast enough I thought I would add my own. All characters belong to Pretty Little Liars and Criminal Minds. To the authors of the other cross-over story – please tell me if you want me to take this down! I've just been waiting for so long and can't wait any longer!

I hope everyone enjoys reading this as much as I am enjoying writing it!

~OhHappyDay2000

Chapter 1 – A New Case

It was obvious the team was exhausted as soon as they stepped into the BAU headquarters in Quantico, Virginia and after their most recent case it was not surprising.

They had just returned home after a particularly nasty unsub had raped and brutally butchered seven young adolescents. The BAU fortunately caught him before the eighth but the loss of such a young life that they had just witness had left them completely without energy. That was often the case and yet again they murmured their saddened goodbyes for although they had caught yet another killer they all knew another would take his place. What they didn't yet know was that it would happen very soon.

It was three o' clock in the morning when Special Agent Aaron Hotchner finally climbed into bed after a long, agonising night. One of the things he regretted about his job was the paperwork! If anything, it was the part he hated the most especially as he had to re-live each case in order to file it and close it for good.

It seemed as if he had just shut his eyes when the phone rang obscenely loudly and he was startled awake. Hunting for the receiver he finally grasped it in his hand, a few seconds passed before a sure 'We'll be there' rang in the empty room.

Hurriedly slipping on a suit he hastily dialled the team and less than two hours later they were on the jet, flying to the little town of Rosewood, Pennsylvania.

'There have been a number of cases in this area that have slipped our radar recently, all of them revolving around bizarre incidents leaning towards murder' Hotch began presenting the case.

'The disappearance of adolescent girl Allison last year triggered a whole range of events that cause community to recoil into itself. Up to date, a whole number of other incidents such as disappearances, shoplifting and reported murders began occurring in the town, all revolving around four of the girl's friends'.

'Umm, sorry Hotch but what has this got to do with us? I mean, there weren't actual murders were there?' meekly interrupted Reid, not wanting to disturb the boss.

'It says here that there was one particular incident in which there was a reported murder but the body was never found.' Morgan read out loud, 'Yeah, sorry Hotch but what's this got to do with us?'

'Guys look at the time line, Allison disappeared a year ago and now the main suspect, one Ian Thomas has just turned up dead. Hotch is right, this is definitively dodgy' said Emily.

'The four girls are called Aria Montogomery, Hannah Marin, Emily Fields and Spencer Hastings. So far, the police haven't been able to get anything out of them. They're hiding something and according to the PD over there, more people might be at risk. It's our job to try and understand what is happening and capture whoever might be responsible if there is someone responsible. We can't leave anything to chance'. stated JJ.

'Hotch and I thought it might be easier to understand the girl's behaviour if we placed some of you with them.' added Rossi.

'Reid you'll be with Spencer – you're both high achievers. Try to get a common ground, she might find it more comfortable to be around someone as academically oriented as her. It might push her to reveal something!' JJ handed over a manila folder, in it, information detailing Spencer's life.

'Prentiss, you're with Hannah. Hannah is a wild child. She's had a few brush ups with the law, nothing major, a few thieving incidents. Her family initially thought this was caused by her father leaving earlier this year but now they're not so sure. She's apparently getting more secretive.'

'Morgan, you get Aria. She's apparently very into English and had somewhat of a rocky past with her family too. Her father cheated on her mother and asked Aria to lie for her. She too has recently begun avoiding her family. Try and find out if this is because of the incident with her father or because of some other issue.'

'Finally, Rossi' began JJ 'I'll go with Emily. Star athlete, swimmer she recently was hospitalized for a stomach ulcer. We all know what that suggests. I'll try and figure out what possibly motivated her to take steroids' finished Rossi.

'Remember this is strictly confidential' said Hotch. 'Anything you find out gets reported to the team first, then to the parents. If we compromise the girl's trust then we will have lost our best point of access into this investigation. Also, the police in this town is very, rustic. They don't trust outsiders and they just want to close the case, they're not looking for the truth. We are. 'Everyone, start reading up on who you'll be spending time with...'

'I've arranged with the families that we can stay with them so that we can more closely monitor their activities!' mentioned JJ.

'Perfect.' Continued Hotch. 'We need to get to the bottom of this, fast, before anyone else gets hurt. We'll be landing in a few hours'.