Reid stares at the pages from a local crime beat tabloid that comes out each week. Each of the victims had appeared in the quick lists of minor arrests at various times. Surprisingly, they were not killed in chronological order of appearance.

"Why these men? Why at the times they were taken?" Reid asks the pages as if expecting an answer.

He stands and tacks them up on a cork board in order of the men's death. It is there, lined up in a row, that he finally sees the pattern. He is glad he took the time to go down to the offices of the paper to pick up actual copies.

"Guys, I see the pattern. And it's eerily familiar."

The others walk over and stare at it. Rossi gets it first. "Holy shit. Really?"

Reid nods. "Really."

Hotch rolls his eyes in frustration. "Care to share with Morgan, JJ and I?"

Reid turns to the other two. "Their appearance on the page are a Fibonacci sequence. See 1-1-2-3-5-8-13." He points to each name in turn.

"That is highly fucking twisted," JJ states. "The unsub would have to wait for a person to do something in Clark Park, make sure it's part of the sequence, and then take them at the right time? Who the fuck is this guy?"

Hotch slowly shakes his head. "We've been looking for an activist or a religious zealot. He's neither of those things."

Morgan sighs and drops down into a chair. "We have to start over at square one."

"Maybe not," Rossi says. "The activist or zealot angle could be combined with OCD."

JJ nods a little. "True. Someone with obsessive compulsive disorder could be patient enough to wait for the pattern to work. But eventually the numbers will run out. I mean, there are only so many numbers in the sequence that will match the parameters he needs to kill."

Everyone stares at the board, not sure what they have that's correct and what isn't. Finally Hotch walks over to one of the chalkboards in the room. He erases everything on it.

"Okay, from the top as if we're looking at this for the first time. What do we know?"

By 5 p.m. they know they are stumped. And they know they are pissed. Even Emily had gotten frustrated as they had all gone back and forth on the profile of the unsub. Hotch finally puts his foot down.

"We need to stop. We're all angry and frustrated. We need to step back and relax. Prentiss, shut down your computer and play with Henry. The rest of us, dinner at a nice restaurant with talk about ANYTHING but the case. We need to turn it off for tonight."

They hear a sigh through the speakerphone. "I won't argue," Emily says. "I know the answer is in front of us. It will hit one of us tonight."

Rossi nods. "I agree."

"I'll call you when we get back to the hotel, Em," JJ says.

Emily smiles. "Take your time. I'll be here. Love you, Jen. Love you, too, boys."

Reid smiles. "Not what you said to me when we were arguing earlier."

Emily laughs. "I said you were annoying but I never said I didn't love you," she points out.

Hotch grins. "Talk to you tomorrow, Prentiss." He hangs up and the BAU team leaves for the night.

None of them notice the janitor watching them from across the room…