MOO
Let's say bc's roommate planned a weekend trip for themselves for the weekend of June 9 a few months ago (during the time of his kidnapping views on Fetlife). Then on Friday june 9th with roommate gone BC starts trolling for his victim, knowing he has until the end of the weekend when roommate comes back. He starts at 9-10 am in a quiet residential neighborhood by impersonating a police officer near campus and attempting to lure a young girl, unsuccessfully. Maybe makes more attempts that are unreported or maybe just drives around frustrated. Then, 4-5 hours later he spots YZ By this point he is running out of time in his mind and is desperate. He gets her in his car. I believe a gun or knife was likely employed as a threat once she caught on he wasn't heading to one north. He uses this weapon to quickly get her into his empty apt where he quickly binds her and assaults her. Then, Saturday, he kills her, dismembers her in his bathtub, and brings her pieces to his car. He drives out of town on one of the many many many lonely country roads and drives around again for 5-6 hours, just like Friday, and disposes of her piece by piece in fields, drainage ditches and ponds where the elements and animals do the rest. Sunday, he cleans his car for fingerprints and hair and his bathroom top to bottom with bleach. June 15 FBI luminal his bathtub and find evidence of possible blood spatter Effected by bleach so untestable for her DNA and not enough blood left to show a large amount. They suspect she's dead due to their suspicions about the luminal test and possibly video evidence of him gassing up or heading out of town on a main road Sunday. They watch him hoping for a slip up, revisiting one of the dump sites, bragging about his crime, until the vigil when they must act to protect the public and it becomes clear he is not going to revisit any scene after 2 weeks. This is just a theory I've been cooking up based on my overactive imagination and years of watching crime tv. Totally just my opinion of course.