"ID's just come in." Brass said loudly, approaching the two CSI's as he walked into the living room. "A Jane Sanders. Daughter found her earlier today. Husband rang the police." Brass told Catherine and Warrick.

Catherine frowned, surveying the body in front of them. "Time of death is approximately a week ago though…"

"As if you couldn't tell from the smell." Warrick added, making a face as he snapped a photograph of the victim.

Brass shrugged. "What the uniforms told me."

Catherine nodded, looking around the room and then back to the body. "Well we've got pretty much everything we need. No signs of forced entry though and no signs of a struggle…" She told them.

"She was killed by someone she knew." Warrick stated, shaking his head. He turned to Brass. "Are the daughter and the husband the only other two who live in the house?"

"According to neighbours only the husband and wife do… or did. They've got four kids. Tim, the eldest, thirty something, lives out in Oregon. Military. Has visited once since he left home nine years ago, and that was when the house was burgled."

Catherine frowned. "Their neighbours pay that much attention?" She commented, doing a final check over of the room.

Brass shrugged. "Then there's the first daughter Carrie. Around twenty-nine. Works as a lawyer out in New York. Also only seems to have visited that once."

"How long ago did she leave?" Warrick asked.

"Don't know, not too long after 'Tim' apparently." Brass replied. "Then there's Gregory, a scientist here in Vegas, twenty six or so, and then Marie a—"

"Gregory?" Catherine interrupted, puzzled. "Did you say her name was Jane Sanders?"

Brass checked his notes. "Yeah, why?"

"So the son would be Gregory Sanders?" Catherine asked again, throwing a concerned look to Warrick.

"I guess so." Brass replied, still confused.

"You don't think…" Warrick trailed off, looking to Catherine.

"This is Greg's mom."

~~

Grissom frowned. "Are you sure it's his mom."

Catherine crossed her arms. "Gil, you just told me that his sister came in here telling him their mom was dead. There's a picture of him on the mantle piece. Yes. I'm sure it's his mom."

"So you're gonna have to question him." It was more a statement than a question.

Catherine nodded once. "Yeah. So far we've got next to no leads. No weapon, no motive. Nothing."

Warrick spoke up. "Jane Sanders, and her family, according to neighbours, were like the perfect family unit, when they all lived in the house. Polite, friendly, got along, had loads of friends. Then the kids left and never came back. All the dinner parties they used to throw stopped. Everything changed. The neighbours to their right, the Jackson's, haven't spoken to them in five years. Before that they went round every weekend to watch the game."

Grissom nodded, taking in the information. "We need to question Greg." Catherine told him. "We can't find the husband, he's disappeared. The sister can't get here until Thursday. The other sister's off somewhere and the eldest brother's running some training course until next week. He's the only one who can tell us anything."

"You've got nothing?" Grissom asked again.

Warrick and Catherine nodded. "The killer walked in, stabbed her, and walked out." Warrick told his supervisor.

"There are no prints, no fibres, epithelia's, nothing." Catherine added.

Grissom took a deep breath. "You're gonna have to question him then."

"Question who?" The three looked up to see Greg standing at the door of Grissom's office. They stared at him blankly for a moment. "What?"