I really hope we see more of the CVS and Walmart receipts. She stopped at those two stores on the way to see Travis. I think they'll answer a few of our questions. (Hair dye, KY, knife?)
I believe there are seeds of truth in Jodi's account (these are bolded). She was desperate, frantic and very, very angry. A man she'd spent nearly two years investing in continually rejected her. She'd changed her religion, she'd moved closer, she'd been nice to his friends, she'd given it her all - literally. I've always believed sex with Travis was really just a means of making him most vulnerable. According to Jodi
he waited up for her and was on his computer when she arrived in the early morning...but maybe she didn't know he would be awake, or even hoped he wouldn't be. Perhaps her primary weapon was the knife and the gun was her backup weapon. She planned a stealth attack while he was sleeping.
When she finds he's awake she needs to come up with a different plan.
She gives him the check for the car. (She may even have used said check as a way of making contact with him.) She apologizes for having hacked his accounts (or denies it so resolutely he believes her) and explains she did it just because she loves him and can't bear the thought of him being with someone else. She continues a psych assault of epic proportion. Insisting how wonderful he is, how she can't get over him, how she can be what he wants, and makes a million promises she has no intention of keeping. Travis was known by all his friends to always want to see/believe the best of others.
Travis finds himself wondering if he might not be wrong about her. How could this sweet girl, who'd done so much for him, want to hurt him? How could he believe she would violate his trust? She was beautiful...and he was attracted to her. Maybe, he thinks, just maybe it could work. Later that day he finds himself doubting again. (I believe just before his death the gravity of who Jodi was, or what she could do to his soul, was weighing on him.) Perhaps he tells her of his concerns. If so it would validate her worst fears - and her reason, I believe, for going there in the first place. He does tell her he has plans and needs to get a move on. She knows time is running out. And she knows he wants her out of his house - this might be her last chance before he leaves for Cancun. Mexico. Where she's dreamed of going. And he had the audacity to invite a platonic female friend over her. Eight minutes. Jodi has eight minutes while Travis is showering and she's snapping pics to finalize the details of her plan.
She does drop the camera - perhaps while she is reaching for the knife. (Ceiling shot)
She'd brought her purse into the bathroom in anticipation of this. She believed it would be one well placed stab wound and that would be the end of it. Travis stumbles from the shower and grasps onto the sink. She frantically stabs at his back and head trying to get him to go down. Her rage is immeasurable.
He crawls from the room desperately trying to get away from her - all the while she is still hacking away - her hands and feet both slipping in blood - causing cuts to her fingers. As she slips she steadies herself against the wall. Travis makes it to the door of his bedroom and collapses. Jodi straddles him and slashes his throat. She turns him over and drags him back to the bathroom.
She kicks or steps on the camera still lying on the floor. (Dragging shot.) She places Travis, bleeding profusely, in the shower. Travis is very likely dead but Jodi wants to make certain. She retrieves a pillow from his bed and uses it as a silencer. Maybe she even tries to fire more than once
but the gun doesn't go off. She washes the body off to remove any traces of her DNA and cleanup commences.
The pillow, knife, and gun are all collected for disposal. She erases the pics from the camera believing them to be permanently deleted. She throws the camera in the washing machine with a healthy dose of bleach believing this will destroy DNA and fingerprints left on the camera. (I really don't get why she didn't take it with her other than believing there was nothing on it that could be traced back to her.) Obviously she didn't watch enough crime shows.
(My working theory so far. Sorry for the length! :blushing
ETA:
Chanler: I am so, so glad to see you here! You sleuthers had this case impressively pegged years back. (I've been reading the old thread and wishing we had the insight of those who've followed it the whole way along. A sincere thank you!)