As the convention continues with its clamorous hubbub, Warrick is collecting evidence in the world's largest RV. So does it work as a ski lodge, a beach house, and state-of-the-art virtual office because it combines the square footage of all three separate structures? Fortunately for Warrick, he finds a semen sample in the toilet. Snapping open the flip-bottom lid that separates the bowl of the toilet from its waste tank below, he spies several condoms sitting on top of...things better not contemplated in what was presumably a new vehicle. Warrick mutters to himself, "So that's why they call it a recreational vehicle."
When we get back to the morgue, David the Compact Coroner is explaining to Catherine, "Her COD is strangulation. Whoever did this used a lot more force than they needed to. There's bleeding in the neck muscles, fractures in the cornu of the thyroid cartilage and the hyoid bone." Catherine asks if David did a wet mount. He tells he did, and he "found motile sperm in the vaginal cavity." Catherine's eyes roll expressively. Well, at least some part of her face is still capable of expression. Catherine says, "Well, Warrick found several used condoms in the RV. Killer must have run out and started riding bareback." David's all, "Don't go assuming anything there, what with me not having mentioned any evidence that would imply penetrative sex." He adds, "The semen was found at a depth not consistent with penile penetration. In this case, only a couple of inches in." Catherine's eyes roll in another direction -- hey, they're doing the work of an entire face here -- and she archly suggests, "Maybe that's all the killer had to work with."