Disclaimer: I do not own any of the characters.
Dr. Spencer Reid has always been different from others. Growing up was difficult for the genius who had an IQ of 187, an eidetic memory, and can read 20,000 words per minute. He also holds PhD's in Engineering, Mathematics, and Chemistry. He even has BAS in Psychology and Sociology. Some thought it was odd for someone so smart to have a career like his. Dr. Reid has worked for the BAU since the age of 22.
The BAU (Behavioral Analysis Unit) is part of the FBI, and they investigate many criminal cases which are mostly serial killers. The department has to get into the mind of the killer before the killings escalate. On the outside Spencer looked happy with the way his life is, but on the inside he was screaming relentlessly. Spencer knew that there were things out there even worse than serial killers, and that there can be a monster under a scared child's bed that is really trying to grab him. Dr. Spencer Reid knew all too well of this, and has known since he was a little boy.
Flashback-Nevada 1986
Five year-old Spencer Reid already knew that he was different from others. He was reading chapter books while other children were still reading picture books. After finishing another book, he went to his mother's bookshelf to pick another. The book was David Copperfield by Charles Dickens. When he opened the book, whoever, it was something else entirely. He started reading some of it, and couldn't bring himself to stop. It was talking about vampires and other creatures that roam in the dark. While turning a page, a letter fell out. Like any curious child, he read it.
Dear Diana,
Congratulations! I am so proud at all you accomplished. I hope that your son gets your intelligence. I hope that someday I get to meet Spencer, and he already sounds intelligent for someone who has just arrived into the world. I am so sorry that I could not do more for you, but you sound happier than you did when you were here. If you need anything please call.
Your loving friend,
Rupert Giles
Spencer could not help but wonder what the man meant by that. Further in the book, Spencer found a picture. In the picture there was a man and woman. He already knew the woman was his mom, and then he read the back of the photo. His mom and Rupert's names were on the back.
That evening the boy asked his mom about it. His mother told him about a group who called themselves 'The Watchers', and how they are to project a girl called 'The Slayer'. "There are monsters out there Spence. Both human and creature. The Watchers and the Slayer get rid of the monsters to protect the world," his mother told him. Diana Reid went to school to become a watcher, but had to leave because of her mental health. She told Spencer everything because she could never lie to her son.
After that day Spencer never went out after dark, and he slept with a flashlight. His mother taught him how to fight a little so that he could protect himself just in case anything happened, but he was not supposed to use what he learned against people. Six years later, he graduated from high school. Not long after that Spencer did what he did not want to do. He had to put his mom in a mental institution due to her schizophrenia, and he hates that he had to do it to this day.
End Flashback
Dr. Reid got up to leave his desk at the BAU to go home, and he decided to take the stairs since he was the last one to leave. He still could not bring himself to use the elevator alone after him and Derek Morgan got trapped in one while on a case. What he did not know was that he was being watched as he exited the building. At least that is what the one doing the watching thought.