In the real world, crimes aren't solved within the span of an hour of television and as Greg had come to learn over the last year or so of being a CSI, every piece of evidence no matter how inglorious it might seem at the time of collection had the potential to become the key to putting a suspect behind bars for a very long time. His years in the DNA lab had taught him at least that much; the best DNA samples came from the nastiest stuff. So as he continued to plod diligently through evidence that had been collected at the crime scene where Sophia had been shot weeks after the fact, he wasn't completely surprised to stumble across something that in and of itself probably had been innocuous at the time, but now armed with the knowledge of other evidence that had been processed and knowing who the shooter had been, Greg realized that this simple piece of stained fabric told a story that none of them had really anticipated. With the DNA results that Wendy had just provided to him and a grin of thanks to her, he quickly got up from the layout table he'd been working at and set off to find Catherine.

Catherine was in the middle of a search of her own. Since they had quite literally had someone claiming a connection to the murder weapon dropped in their laps she had been trying to find a paper trail that might lead them to Billy's uncle Frank. Frank Sutherland was a prominent businessman in Las Vegas and had all the appearance of being a fine upstanding citizen, however, she had learned long ago that things were often not the way they seemed and had been trying to dig a little deeper ever since without having to obtain a warrant. So far she hadn't gotten any further than his company's annual report and a search through law enforcement databases to see if he'd had any brushes or run ins with the law. So far, Frank seemed squeaky clean much to her chagrin.

Greg was a little out of breath as he rounded the corner into Catherine's office, but looking very eager. "I got something."

Catherine glanced up and arched a single brow at Greg. "Please tell me you've got something on Uncle Frank; so far he's got a cleaner record than most of the men I've dated." Her tone was tongue in cheek, but deep down she had to admit that there was probably at least some truth in her statement.

"Well that's because you've never dated me." There was amusement dancing in Greg's eyes; he'd be lying if he said he'd never entertained the idea of romancing Catherine, but he knew that she wasn't his type, and she didn't generally date men as young as him; a point that she'd made to him more than a few times over the years. When he'd worked in the lab he flirted shamelessly with all the women, now it seemed he'd become decidedly more serious since working out in the field and the flirting with coworkers seemed to be much less frequent these days.

Catherine pursed her lips together to contain her smirk; as much as she knew he really didn't want to date her, she appreciated the boost to her ego. "What do you have?" She noticed the report in his hand and held hers out expectantly.

Greg held it close to his chest for a moment. "Just the piece of evidence that's going to crack this case wide open." His confident grin underscored his belief that what he'd just said was true as he handed the report to Catherine.

Her eyes studied the report for a moment and then as the realization hit her, she glanced up with her mouth slightly agape. "What was this from?" She wanted to make sure what she was seeing was really what she was seeing.

"From some of the original evidence that Grissom collected." For some reason in the overall scheme of things, they had focused on the evidence that they had collected first and had then realized that what few pieces Grissom had collected were still waiting for processing.

"In the bedroom where Walter Bradley's body was." Catherine wanted clarification because if this was the case then they just might be very close to solving this case.

"Yes." Greg confirmed as he began to fill Catherine in. "So it seems that maybe our friend Billy wanted the gun back for another reason." It had been rather easy to compel Billy to volunteer a DNA sample under the guise that they needed to use it to make sure he really was the guns rightful owner. The reality was at the time of his confession, there wasn't any solid evidence beyond his claim that the gun belonged to his uncle to charge him with any crime and so he'd been released.

"Or maybe he was a pawn for Frank Sutherland." Catherine just didn't think that Billy was smart enough to commit a murder that looked more like a hit. She still liked Gunther for the crime; they knew he'd shot Sophia with the gun and had assumed that he'd shot Walter Bradley too, but they didn't have was any physical evidence that he was in the room where Walter Bradley's body had been found. That had left open the possibility of more than one assailant and here was Greg providing proof that at least one other person had been in that room.

"Could be; he seemed pretty freaked out that he couldn't get the gun back to Uncle Frank." Greg wondered how in the world the kid had gotten mixed up in the whole thing anyway; he didn't seem the type that would get mixed up in something like murder, but then again, lots of things about this job didn't make sense.

"Maybe we should have Brass call Billy and tell him we need to ask a few more questions." Catherine knew that there had to be someone else behind all of this; the kid was no mastermind and based on the rap sheet of their dead shooter Gunther, he was no braniac either, just a hired thug.

Greg grinned at her. "I thought you might say that." He had taken the liberty of calling Brass on his way to find Catherine and he'd agreed that he thought he and Billy needed to sit down for a nice heart to heart talk in an interrogation room.

Catherine's smile was genuine. "You know, you're shaping up to be a pretty good CSI, Greg." She meant it; the year he'd spent being mentored by Sara had been a valuable one and now she was sincerely glad that they were on the same shift and he was working her case.

"You want to drive down to PD, or should I?" Greg was please for the compliment; he knew Catherine didn't hand them out unless she truly meant it.

"I'll drive." She smirked at him; if she let him drive, it might take all day; he could stand to learn a few things about driving a bit faster from Nick or Warrick who had both been tagged with the nickname Mario on occasion. Of course a ride with either of those two could also have you wondering if you were going to get to the crime scene in one piece, but at least the evidence would be a hell of a lot fresher. "You call Warrick to meet us in the parking lot." She wanted to make sure that if Billy was guilty or offered up his uncle that the entire team working this case was there.

"I get shotgun." Greg smirked.