So we're not dealing with animals known for moving around, except in bits and pieces. And in the research I did, I couldn't find any documented instances in which a mature adult tapeworm fled its dead host. I'm inclined to disbelieve CSI's scientific veracity here, if only because I can't believe that in a world where there are an estimated 100 million tapeworm infection cases annually -- some of which inevitably contribute to the death of their host -- we haven't seen the Animal Planet show Peripatetic Parasites where all the dispossessed cestodes are wandering around, looking for a new host. I'm also inclined to wonder: Were the people who wrote this maybe thinking of roundworm (Ascaris lumbricoides) migration, described here in delightfully squirmy detail? I mean, I'm open to documented incidents in which a tapeworm was seen fleeing a dead body, and if you know of any, put 'em in the episode thread. I just haven't been able to find any myself, and it's not for lack of looking. ANYWAY. Did that scene suddenly make you paranoid about your own intestinal flora? Anyone?
Sara swings by Mia's lab for a little girl talk about semen. The semen on the doorknobs is consistent with Trip's DNA. Mia concludes, "What I'm thinking is that Trip put a trophy condom on his neighbor's door, and then transferred a trace of his reproductive material back on to his own doorknob." Sara looks a little weirded out that Mia's so comfortable with the idea of trophy condoms; Mia says wryly, "Sara, I went to college." Well, so did I, and we didn't decorate with prophylactics either, so step off, Mia. Liam comes in right then to share the news that he "just spoke with WLVU's student affairs officer. Apparently Trip's next-door neighbor, Zach Capola, filed several grievances against him. I'm headed over there now." Sara begins to take off and says, "I'll drive." "You always do," Liam says forlornly.