Red-faced, Nick and Sara released their embrace to face Catherine and Warrick, Catherine's comment still hanging fresh in the air. Catherine looked amused, "You know as much as I'd like to continue torturing you two, we need to brief Grissom. I've called Brass and he'll be here in 5 minutes. Why don't you two pull yourselves together and come inside."

Sara climbed out of the Tahoe and closed the door. Up to this point, Warrick hadn't said anything other than to chuckle to himself. "You know, it's about time you two did something about this."

Nick looked over at Warrick with a quizzical glance.

Warrick responded, "Don't give me that man. It's not like you haven't been flirting shamelessly with Sara since she first got here." In response to Sara opening her mouth to speak, he replied, "Oh, and Sara, you haven't exactly been immune to Nicky's charms either."

Nick and Sara looked at each other as if to try and protest that either of them had done such a thing, but catching each other's eyes they just smiled.

Catherine interjected, "Ok, ok. Let's get inside. We have a murder to solve, then you two can go back to doing whatever it is you've been doing when you're not here. I don't think Grissom would take too kindly to find two of his CSIs making out in the backseat of the Tahoe."

The four CSIs made their way into the building, down the hall into the break room where Grissom and Brass were waiting. "I hear you have some new information." Grissom queried.

Nick took the lead, "Yeah, after we showed Rhonda Stone the video stills from the bus, she said she recognized her son Robby. We asked where he was and she indicated he was at work at a pet store. I thought it was strange that he was working so shortly after his father's death, so we decided to go check up on Robby. He didn't seem too broken up about his father's death, he acted as if it was just another day at work. He seemed more interested in the cat he couldn't take home as a pet. I got a very interesting piece of information though. In conversation he mentioned that he was adopted."

Sara continued, "So since his mother believes he was on the bus at the same time her husband was, that might give credence to why he sat at the back of the bus. If his son was already on the bus, he'd be inclined to go sit with him. Since Robby says he's adopted, that might explain why we found his prints on the money, but we didn't get a familial DNA match from the foreign DNA found on the vic's clothes."

Brass interrupted, "I think we have enough circumstantial evidence to get a warrant for his DNA. I'm going to go pick him up for questioning."

Just then, Catherine's phone rang, "Willows. Yes, Mrs. Stone. I'd appreciate that. Ok, then, we'll see you in about 20 minutes. Great." She looked over at the rest of the team which had stopped to observe the call. "That was Rhonda Stone, she's bringing Robby in so we can question him. They'll be here in about 20 minutes."

True to her word, Rhonda Stone brought her son Robby in for questioning. Brass interviewed the boy with his mother present. He asked Robby whether he was on the bus that day. He indicated that he was. Brass asked Rhonda Stone if Robby was adopted. She confirmed that he was. "Mrs. Stone, I'm afraid that I'm going to have to get a DNA sample from Robby. I can either get your consent, or I'll need to get a warrant. Since he's a minor, you have the right to waive his right here."

Rhonda Stone contemplated her son briefly. He was just staring at the table where he fiddled with his fingers. He didn't say a word. Rhonda Stone looked back up at Brass and just nodded.

Catherine entered the interview room and walked over to Robby, "I need you to open your mouth." He looked up and complied, his eyes ready to spill over. Catherine swabbed in the inside of his cheek, "All done. Thanks." She capped the swab and left the room headed down the hall to the DNA lab, where she had Greg put a rush on the analysis.

Brass left Rhonda and Robby Stone alone in the interview room. Grissom, Nick, and Sara watched from the observation room behind a two way mirror. The pair in the interview room occasionally looked at each other, but remained silent. The trio behind the glass studied the pair. Nick broke the silence, "I can't even imagine."

"Yeah," Sara echoed his sentiments.

"It's still circumstantial at this point, we don't have the DNA results back yet." Grissom reminded.

Catherine entered the room, "Yes, we do. It's a match to the foreign DNA we found on the vic. I'm going to suggest that we get a sample of the carpet from the display window at the pet store to compare to our mystery sample."

Nick interjected, "Already did, Catherine. When I was holding that kitten, he left a little bit of evidence behind on my shirt. Greg is analyzing it."

"Oh, so that's why Sara was picking at your collar." Catherine stated with a smile on her face.

"Among other things," Sara confessed to a smiling Nick, a grinning Catherine, and a shocked Grissom.

Grissom put his professional face back on, "I'll get Brass." And he walked out of the observation room. A few minutes later, he and Brass entered the interview room.

"Mrs. Stone, I'm Gil Grissom. We have evidence to show that Robby was on the bus when your husband was murdered."

The shock registered on her face, and then the tears began to flow as she looked over at her son.

"We also believe," he continued, "that Robby was sitting next to your husband when he was murdered."

Rhonda Stone looked at her son with a gaze of confusion, "Robby, you saw who killed your father? Why didn't you say anything?"

"Mrs. Stone," Brass interrupted, "we believe that your son Robby was the one who killed your husband. We found his DNA on your husband's clothing."

A look of shock and horror came over her face. "Robby?"

The boy looked up at his mother, now an angry expression covering his face, tears threatening.

"Robby!" as realization dawned over Rhonda Stone, "Why!?"

"He wouldn't let me have a cat." And Robby Stone broke down sobbing.

From behind the two way mirror, "Truth really is stranger than fiction." Catherine concluded.