But IIRC there was no strap on the camera or in the washer when it was recovered. Seems a strange thing to think about removing after you've slaughtered your obsession and done a hasty cleanup.
I'm not sure her clean up was all that hasty.
Good point about not strap found in wash, but if it was her own it wouldn't have taken more than a second or two to take it off. She obviously spent time on the camera afterwards, deleting photos, so I don't think it's a stretch she simply took off her strap at the same time.
Thinking more about it, I just can't imagine that she held that camera in her hand the whole time she stabbed him 27 odd times, some of the stabs more than 5" deep.
I think her only focus was on killing him and her rage. If she wanted a trophy photo she could have taken one of him dead. She didn't. And I don't see how the camera could have been videotaping if the inadvertent photos were individual shots, not stills from a video, which they apparently weren't.