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This takes place not long after Prentiss comes back from the dead

Beep! Beep! Beep! 19 year old Aria Tetherman groaned as she slammed her alarm clock off. It had been another long night of performing. After Sam Young failed to show up to work (again), Aria's boss called her in for a last minute performance at the non-alcoholic club a few blocks away from her university. She ran a hand through her tangled hair as she hopped out of bed and looked for something to wear. Her roommate, Tammy, walked back into their dorm with a grin on her face.

"Hey, Ari! I guess you got back really late last night, good luck in class!" Tammy chirped as she started to dial her boyfriend's number. Aria rolled her eyes and quickly got ready to suffer through another long day of classes. Her family and friends all called her insane for getting a double major in psychology and sociology along with working towards a minor in music performance. What they never understood was that she picked up on things easily. "Oh by the way, I'd carry pepper spray with you today. Apparently Sam not only failed to show for work last night, but he's actually missing."

"Oh joy, wonder what Mr. I-Can't-Sing-More-Than-Three-Notes did this time. I bet he got lost trying to find his way home from the only other bar on this street." Aria grumbled as she poured coffee into a travel mug with a generous amount of sugar. However, Aria did take her friend's advice and stuffed pepper spray into her messenger bag before heading out the door to her choir lesson. When she got outside the music building she immediately froze. There were police officers everywhere and part of the area was taped off. Aria ran to the nearest officer and nervously tapped him on the shoulder. "Excuse me, sir? What happened here?"

"It appears as though the missing student has been found. However, he isn't exactly in one piece…or alive." The cop sighed. Aria's mind seemed to freeze at that point. Princeton never pegged her as a university that would become a murder scene. No one was allowed in the building so her choir class was cancelled, but Aria couldn't seem to care. All she could think about was why someone would do this to Sam. Sure, he wasn't Prince Charming, but he could be sweet and was very trustworthy when it didn't come to work.

**BAU Headquarters**

"Okay crime fighters, we got a doozy one. We're going to Princeton, New Jersey to the college campus where three bodies were found within three weeks. The first one was named John Heart, a freshman who was a server at the local non-alcoholic club created for just the students called 'Music of Angels,' which happens to be very popular. The second victim is Abigail Sampter, a junior guitar player at the same club. The last body was found just this morning after going missing the night before, Sam Young. He's a singer at the same club as the other victims." Garcia explained as she brought up pictures of the victims before and after they were murdered. "The only victim found on the campus itself was Sam."

"The ME reports that each victim was slashed through the throat and their vocal chords were ripped out. Perhaps there's a specific musician at Music of Angels that enraged the unsub, they would most likely be a singer. That, or a musician may have been shot down when they applied for a job as a musician and is taking out their anger, but that seems unlikely seeing as John Heart was just a server." Reid suggested as he flipped through the case file. He briefly glanced up at their tech analyst. "Were there any other singers at Music of Angels?"

"There are two others. One is Gina Langfield and the other Aria Tetherman. Aria had taken Sam's shift last night after he failed to show. According to records, she's usually a crowd favorite." Garcia replied as she brought up pictures of Gina and Aria. Reid visibly tensed at the mention of Aria's name. He mentally smacked himself for even thinking that it could be his long-lost sister. His mind began to wander back to when Morgan had found out about her.

**Flashback**

Reid was having a hard time focusing on his paperwork. Since it was the day after a case, today was just for paperwork, much to everyone's displeasure. Usually Reid would finish his (and oftentimes Morgan and Emily's) paperwork early and leave not long after his lunch break. Today was different and it was obviously frustrating him. Today Aria would be turning 18 and preparing to graduate high school. He glanced around the bullpen before taking an old photo out of his wallet. It was the only picture he had of her, when he was holding her minutes after she had been born.

"What's that, Pretty Boy?" a voice behind Reid asked. Before he could react, the picture was plucked out of his hands. He immediately spun around and snatched the photo out of Morgan's hand. His eyes were watery and he cursed himself for not being able to hide the pain. Morgan, thankful for the fat that everyone else was at lunch, raised his hands in alarm. "Take it easy there, kid. I was just curious as to what has you so distracted."

"I…you…it…do you think we can talk in your office to make sure no one hears us?" Reid asked. Morgan was surprised by the request, but walked with Reid to his office. After the door closed and was locked the two men sat down. "S-So you know how my dad left mom and I, right? Well, 3 weeks and 2 days after dad left us mom found out that she was pregnant. She didn't want to get an abortion, but she couldn't even take care of herself and I. How was she supposed to take care of a baby? So when the time came for the baby to be born, she put it up for adoption. I-I have an 18 year old little sister named Aria. I have no idea where she is or who she was adopted by, but I have a feeling she knows who she is. I can't meet her, Morgan. What if she thinks I'm a freak? What if she gets mad that I haven't tried to find her the past 18 years?"

"Look, kid, I can't say I know what you're going through, but let me say this. If Aria ever met you, I doubt she would be angry for never meeting you. I know for a fact she wouldn't call you a freak because you aren't one. My sisters call me stuff like that because I know they're kidding and it's how we express our love for each other. I doubt Aria would do something like that if she was anything like you." Morgan said as he placed a hand on Reid's shoulder. Reid merely smiled a little and left the office.

**End Flashback**

"Rossi, Prentiss, you two will go to the ME's office to see the bodies. JJ, Reid, go to the latest crime scene. I'll go to the station to talk to the head detective." Hotchner announced once the team was on their jet. Reid nodded absentmindedly as he stared out the window. Everyone shared a worried look, but shook it off as nothing. Morgan had a feeling that the name Aria was what caused the sudden change in behavior. While Aria isn't a popular name, it isn't that uncommon, but it's enough to spook Reid. When JJ and Reid got to Princeton University they found a crowd around the crime scene.

"FBI! Anyone who is not an officer please disperse and go on with your day!" JJ announced as she and Reid held up their badges. Slowly, the crowd dwindled until there were a few officers left. JJ and Reid pulled on their gloves and walked to where the body had been discovered. Reid knelt down near the small bloodstain was. An officer walked over and shook JJ's hand. "Hi, I'm Special Agent Jenifer Jareau, this is Doctor Spencer Reid, we're with the BAU."

"Nice to meet ya, agents. Honestly I've never seen anything like this. Why would someone murder three college students?" the officer sighed. Reid picked up a piece of paper nearby, but discarded it since it was blank sheet music. JJ knelt next to him and put a hand on his shoulder. He knew that she was concerned, considering she didn't know about what was really bothering him, but she would never understand.

"Sam wasn't killed here. It's way too high risk and there isn't enough blood here. Slashing someone's throat and ripping out their vocal chords would make for a bloodier scene than this." Reid observed. He looked up at the officer as he began to stand. "The club he and the other victims work at, does it get very rowdy or have a lot of fights?"

"No sir, if there was any funny business going on the owner would have kicked them out before it got out of hand. Nobody drinks alcohol there so no drunken mistakes either. You should talk to the owner for more information on that." The officer answered before walking away. JJ and Reid took off their gloves and glanced around the area.

"There isn't much else the dumpsite can tell us. Maybe the unsub is a musician and has malice towards the department or club here. Either way, this whole situation gives me an uneasy feeling." JJ observed with a frown. JJ pulled out her phone and started texting Hotchner. "We should go check out that club, I'll let Hotch know about what we found out and where we're going."

"I just hope they're open, by the sounds of it they mostly get business at the nighttime gigs." Reid answered as they walked back to the car. Once they got to the club they found it was just opening, getting ready for the rush of students. They found a man standing nearby and walked up to him. They quickly flashed their badges. "We're with the Behavioral Analysis Unit of the FBI. We need to speak with the owner."

"That would be me. Rodney Hamley at your service. If this is about the murders then ask as many questions as you'd like. I don't like the fact that I'm losing some of my best workers." The man replied as he shook JJ's hand. As always, Reid settled with a small wave. The two profilers studied Rodney for a second. He was about 5 ft. 10 in. tall with a receding black hairline. He basically had an aura around him that screamed trustworthy.

"We'd like to know more about your patrons and singers here and how they interact. Even the smallest detail can be useful." JJ said. Rodney led JJ into his office where all the files were while Reid looked around the club. There was a soda/coffee stand on one side of the room with a few tables and booths set up. The dancefloor was huge and had a disco ball hanging overhead. The stage was set up for a guitar, drums, and a mic for tonight's performance. The stage faced the "bar" part of the club, so John Heart would've had a clear sight of the stage. JJ walked out with a stack of papers in her arms and noticed the thoughtful look on Reid's face. "Did you notice anything, Spence?"

"The stage is visible the moment a patron walks in the door and the place where John Heart worked had a clear line of sight of the stage. Maybe something happened with the unsub and the three victims that sent him into a rage that ended up with them dead." Reid answered. In his mind he imagined the room filled with college students and the three victims working. John Heart at the drinks corner, Abigail Sampter on guitar, and Sam Young singing. A man, probably in college himself, walked up to Abigail and tried to make a move, which ended up with her rejecting him. He makes a scene which causes Sam and John to run over to help her kick him out. Reid snapped out of his thoughts once the imaginary scene ended. He frowned, realizing that they were still missing some key points in the case. "We'd need more evidence, but I think something's also missing from that."

"Well the girls who work here are oftentimes flirted with. Most of them back off once they're rejected, but there's always one or two guys who take it too far. Of course one of the favorites to pick on is Aria Tetherman. Poor girl, she's a beautiful singer but is too shy and sweet to tell someone to back off. John and myself are usually the ones who step in. Oh look, there she is now." Rodney replied as he pointed to a girl who just walked in.

Aria Tetherman had long, light brown hair with a purple streak. She was 5 ft. 6 and lean. She had a red tank top on with a denim jacket and dark blue skinny jeans and a pair of black boots. Her eyes easily gave away the fact that her mind was somewhere else, most likely thinking about the loss of her coworker. She gave a small wave to Rodney and the agents before going backstage to get ready for tonight's performance.

"Thank you for your time. If you have any more information don't hesitate to call us. We'll probably stop by later tonight to talk to some of your patrons and employees." JJ said as she gave Rodney her card. JJ and Reid exited the club with the files on the employees in their arms. Reid decided to read through them later on before they went back to the club later that night.

Meanwhile backstage at Music of Angels, Aria was trying to calm down. She knew that the two visitors talking to Rodney were from the FBI. Everyone at school kept talking about the BAU working the case. It was the fact that the man looked extremely familiar that shook her. When she was 12, she had looked up her biological family, finally having the nerve to find out who she was. There wasn't much on her mother, but William was a very successful lawyer. That didn't interest her too much once she found out that her biological parents were divorced. What really caught her attention was her older brother, Spencer. She couldn't believe that she was related to a certifiable genius working for the BAU. When she saw the man at the club, she knew immediately that it had to be her brother. There was one thing nagging at the back of her mind: Did he know who she was?

I'm not going to have Spencer and Aria meet face-to-face quite yet, probably in a chapter or two.

Hope you enjoyed :)