Earth 5

Genius Leonard Snart X FBI Sara Lance

xXx

"Why exactly was your brother looking at classified case files?" John Diggle, senior agent in charge of the major crimes unit of the FBI, stared down his most junior agent, Lisa Snart.

Just over a year ago, Lisa was a law student, graduating top her class. Instead of taking the bar, however, she decided to join the FBI academy, much to the chagrin of her brother and foster father. She was a good agent, quick thinking and very capable, and her potential was only flourishing under her S.O. and his second in command Sara Lance.

"I left them out on the kitchen table for a minute and he saw them when he came home from work." she explained. "He has NSA security clearance though Calsci though." she added when it looked like Diggle was about to snap at her. He stopped short, taking a deep breath.

"Alright, fine, I'll give you that, but what exactly is it that he thinks he can do for us?" Diggle asked looking past her to see said man speaking to his second in command in the bullpen. She laughed at something he said, surprising Diggle enough to look back at Lisa's earnest expression.

"He says that there's an equation he can run that can give us a search area for our suspect. He explained it and he kind of lost me, but we've had no leads in weeks and I figured it couldn't hurt to try. At the very least maybe it gives us all a chance to step back and see things differently."

Diggle sighed. "Alright." he agreed. "I'll hear him out."

xXx

Leonard Snart was not the product of his early environment and thankfully neither was his sister. Their mother had died not long after Lisa was born and their abusive father was far from qualified to take care of them. This left Leonard to take care of Lisa, a job he came to love as she grew into a capable and beautiful young woman. Sometimes their lives didn't make sense to him, it seemed unfair that they should be left to suffer for their father's crimes, but Leonard stayed on his feet and fought hard for his little sister.

Through all of it, Leonard had the numbers. Since he was young he'd always seen things in terms of numbers, understanding complex equations that made no sense to men twice his age and experience. For a while he used that gift to support his family, running numbers for bookies in the area. And then, his father went to prison and everything changed for the better.

"They've been in there for awhile. How badly did I get her in trouble?" Leonard asked turning to look at the blonde woman sitting at her desk. Sara Lance, Behavioral Analyst and Field Agent. She looked at him with a soft smile.

"I wouldn't be too worried." she told him. "Digs tough but fair." she finished typing something up on her computer then turned to face him fully. "So, Lisa said you might have something that could help us?"

Leonard seemed to perk up at her question and he took a seat next to her desk. "So basically, from the brief glance of the files Lisa brought home-" he then proceeded to launch into a complex explanation of mathematical equations that flew so far over Sara's head she lost sight of it almost immediately. Sensing her confusion he stopped short, smiling ruefully. He looked away abashed. "I've completely lost you haven't I?"

"A little bit." Sara laughed. "But to be fair, math has never been my strong suit."

He chuckled. "I'm sorry, sometimes I get lost in the numbers." he explained. "Let me try it this way. Think of a lawn sprinkler. Using an equation we can predict exactly where the drops of water will land. But let's say, as in this case you're working, you don't know where the drops came from; you can't see the sprinkler head. Using where they landed we can accurately determine where they came from."

She nodded. "Sounds legit." she joked and they shared a laugh.

"Yes, very legit."

"Lenny?" Lisa's voice interrupted. Leonard turned to see her walking toward them and he stood, concern clearly etched on his face.

"Hey, is everything okay?" he asked.

"Yeah, he's willing to give it a try. He wants you to brief the team." she explained.

"Oh, yeah alright." he agreed following Lisa into the conference room.

A bit of advice Professor." Sara said to him drawing his attention from his computer where he was setting up. "Stick to the sprinkler analogy."

"Yes ma'am." he smiled shyly.

xXx

When the equation was complete the area was too large. They didn't have enough data and since data in this case involved the brutal murders of innocent young women, they weren't willing to wait around to collect more data. That's where Barry Allen came in.

Barry was the youngest Forensic Tech to ever work for the FBI, a genius in his own right, he was the head of the FBI forensics unit. Using the evidence he found, knowing that those pieces of evidence could only be found in certain areas of the city they were able to narrow down the search area.

They found him, his next victim waiting in the wings, and he wasn't willing to go down without a fight.

xXx

Leonard stopped what he was doing taking a deep breath, the gravity of the situation settling on his shoulders. "You did really well out there big brother." Lisa's voice interrupted his thoughts and he looked up to find said woman standing across the table from him.

"Someone died because of my equations."

"A bad man died because he was hurting people and he would have hurt more people if you hadn't helped up stop him. We found him with his next victim, Lenny, he would have killed her if we hadn't listened to you."

Leonard nodded in understanding, going back to packing up his stuff. Silence fell between them and Lisa took a step forward. "You know, Agent Diggle is talking about bringing you on future cases now. I think you converted him."

Leonard smiled ruefully knowing full well what his little sister was trying to do. "I only presented him with the facts. Numbers don't lie."

"Yes, well, your truth telling numbers have convinced my no nonsense, by the book boss to buy the first round of drinks. You in?"

Leonard chuckled. "Yeah, I suppose I could have one drink."

"Ugh," Lisa glared at him in mock annoyance. "You're such a stick in the mud. You can have more than one drink, old man!"

Leonard rolled his eyes as he finished packing up his leather saddle bag. He looped it over his shoulder and threw an around around his sister, leading her out of the conference room.

"I'll think about it."