Disclaimer: I do not own Criminal Minds and Never will but I do own Dr. Karter Cowan.

SSA Dr. Karter Lee Cowan walked into the BAU on his first day of work. Karter had been recruited to the FBI after college and had flown through the academy courses but had trouble with the physical parts of it. After graduating from the academy he had swiftly been chosen for an empty position in the BAU. As he opens the big glass door heads turn as to inquire to who the intruder was. David Rossi, a friend of Karter's parents, came over to help him to his new desk, the one left vacated by one Emily Prentiss.

"Thanks Agent Rossi"

"Karter how many times do I have to tell you just call me Dave."

"Right. Sorry."

As this exchange was going on the rest of the BAU was looking in awe. Who was this man and how did he know Rossi?

Karter sat down at the desk and was meant by the staring gazes of Reid, Morgan, and JJ.

"Hi, I'm Karter." He said trying to be nice and show the utmost respect to the team considering he was an intruder.

Morgan was the first to recover, "Derek Morgan and this is Dr. Spencer Reid and Jennifer 'JJ' Jareau"

Karter took all their hands hoping they wouldn't notice the twitch in his right eye that was part of his Aspersers. Finally Agent Hotchner came out of his room much to the relief of the young Dr. Cowan.

"Dr. Cowan it's nice to meet you Dave has told me so much about you"

"Really," Karter squeaked hoping that Dave hadn't told him everything.

"Yes, would you mind coming to my office?"

"No sir." Karter sheepishly said hurrying out of his desk to Agent Hotchner's office.

"Shut the door." Hotch commanded, "Karter Dave tells me you have a special talent."

"Yes sir."

"Would you mind telling me about it."

"Not, sir. Well you see I've had Asperger's from a very young age and with my Asperger's came the ability to almost enter somebody's mind by what I see or read about them. Like, a few years ago Dave asked me for help with a profile and I, in layman's terms, became the killer."

"Thank you Dr. Cowan. Now I have to ask you a favor."

"Yes, Sir."

"First, stop calling me sir just call me Hotch. Secondly, there is a file room in the basement of the building, I was wondering if you could look over the files we've done for the last few years and see if you can find what drove them to the kill and ,as you said, become them."

"I can do that Hotch." Karter says leaving the office. "wait. Start with any file."

"Yes. Good luck."

"Thank You." With that Karter walks out of the office leaving a few curious stares behind him and heads to the basement to start his task.

A.N.: Thank you for reading. This was the beginning piece for a series in which I will have Karter explore minds of unsubs over the years and maybe even a few book and other TV villains. Review please!