It doesn't make sense, for sure, but we are trying to understand her using logical minds. She is just that obsessive, in my opinion. She couldn't stand the thought of being marginalized by Travis, so she killed him. She couldn't stand the thought of being marginalized by his friends, family, and even the police, so she went out of her way to put herself front and center. The eighteen-page letter to Grandma should stand as Exhibit 'A' here -- who the heck does something like that, if not someone with a serious personality disorder?
Everything she did post Travis' death points to obsession, both with Travis and more importantly with herself. Even now, she cannot stand being marginalized. She magnifies every word she ever spoke to him, or him to her, as some kind of poetic masterpiece filled with meaning and symbolism. She claims an eternal love which all of us normal mortals are simply incapable of understanding, though she will condescendingly deign to allow us a glimpse via her ramblings. Even when what she says clearly points to an obsessive, unhealthy stalker-like attitude, she can't help but tell us about it, because that is the only way we will remember the only important thing in this case -- her.
As for the memory stick, SMK and BW0000 have posited that the pictures were not taken on that date and she intended to use them to discredit him with his family and friends. Whether that's true or not, I wouldn't be surprised to know that she left the stick in there -- perhaps subconsciously -- because she loved the idea of others seeing her naked, as well as the results of her handiwork with the knife. You can see how fascinated she remains with those pictures every time they are shown in court. It would be consistent with the NPD she almost certainly has, in that she would be unable to recognize the self-destructive qualities of her actions, being so intensely focused on herself and her desires. All :cow: