"I should have made the connection. The baseball card, the butterfly, attacking Elle at home. He clearly wants us to know that he knows us. He's studied us, From Garcia told JJ about the game, he must have figured out who she was and had been targetting her for weeks."

"When she was so hooked on all his romantic talk that she brought the laptop to work, it made his job easier. But what how does that give us any new information?"

Spencer looked around the room. Only one person knew what the unsub did about him. His deep, dark secret.

"The unsub also knew about me. About me and my mother. He didn't just find me in Vegas. He found me at the hospital. He had the key delivered there."

"Hospital?" Derek looked at him, curious.

"For the past three years, my mother has been a resident of the Bennington Sanitarium. It's about a hour outside of Las Vegas." Spencer swallowed. Just saying it all out loud was making him feel sick. He hated the feeling.

"Your mother is . . ." Hotch asked softly.

"Schizophrenic. When I was younger, things were stable. No one knew there was anything wrong. My father made sure she took her medication and my brother and I grew used to her moods. When my father died, Michael was old enough to keep things together. But then he died and things sort of fell apart. We had an argument about my joining the FBI. After I left, my mother. I don't know exactly what happened. I just know that she was completely off her medication, she was a danger to herself."

"You had her committed."

Spencer nodded. "I didn't know what else to do."

"You think the unsub knows about all this."

"Yes. I think he knows everything. About my mother being crazy and about before."

"Before?"

"Before my mother had her breakdown, she was a college professor. 15th century literature. Her passion was women in the middle ages. Stories about them, stories by them. She used to tell me all sorts of stories. It was our bedtime ritual.

"One of the stories was about a young boy who dreamed of being a knight but his mother didn't want him to. His father and brothers had been knights and were killed in battle. Only noblemen could be Knights so she took him and ran off and lived as a peasant.

"One day a group of knights came by the land where they were farming. They were tired and thirsty and this young man offered them food and water. When they asked what they could do to thank him he told them that what he had always dreamed of was being a knight. But he couldn't because he was a peasant. But they invited him to join them anyway. And Percival said yes."

"Percival? Wasn't he one of the Knights of the Round Table."

"Yes. The youngest and typically viewed in the stories as the most innocent of heart. He was also one of the knights to go on a quest. Seeking the Holy Grail."

"The Holy Grail?"

"In one common version he is traveling with 5 fellow knights and they come across a castle by the sea. An old knight lives in the castle. He's been injured and can't fight anymore and just spends his days alone in this remote castle, only leaving to go down to the sea to catch fish to eat. But he has another task. He's been entrusted to protect a great treasure. A treasure that he can only reveal if the seeker asks him the correct question."

"Let me guess. He's got the Grail."

"In fact yes."

"And Percival asks the question and gets it."

"Not the first time. But eventually."

"And you think that our unsub knows that you would know this story and he's mocking it. Sees himself as this king and the girl is his holy grail and you, the youngest agent, are his Percival. A knight despite your widowed mother's wishes." Hotch shrugged. "it does seem to fit."

"There's something else."

"Yes?"

"My mother wrote a book. About the legend of Percival and the Fisher King. How the story was an allegory for the turmoil of the time."

"Please tell me you have a copy."

Spencer nodded. "It's at my apartment."

Derek grabbed his jacket. "I'll drive."