Lots of strange aspects to this case, and all of them stem from the the story (or stories) told by the brother. Remember, his word alone identifies this as a home invasion/abduction. There is no one else to verify or refute his account.
News reports initially said that the brother watched his sister being dragged into the woods. I realize there has now been a concerted effort to dismiss this as resulting from confusion over verbiage, but does law enforcement normally do that? Don't they usually place great stock when someone changes a key term like that, or claims they were misunderstood (or that they were exagerating, as some reports have indicated the brother and the mother both reported, in order to get the police to act quickly)?
The brother is looking out the window, for unclear reasons, at a time where he happens to see his sister being "led" into the woods. What made him look out the window at that moment? Why wouldn't he be just the least bit suspicious of his sister taking off for the woods with any man (even a boyfriend) at that time of the morning, when she is supposed to be getting ready to leave for school?
Then there is the belated discovery of blood- not reported at all in any early stories. The blood had to have happened in some manner (stabbing, blow of some kind) that should have warranted some kind of shouting or screaming from the victim. The brother didn't report hearing any. Unless she'd already been injured and was unconscious (and being led away from the house), this makes no sense. But it makes no sense then, either, because the brother should have seen someone carrying his unconscious sister away, shouldn't he?
Another element that I find curious is the fact a 20 year old woman was carrying a "lunchbox." I've never heard of a female that age doing such a thing. Am I that out of touch? And why would she have that with her, during a stroll in the woods? Again, makes no sense.
I don't claim the brother is guilty of anything, but this whole account is ridiculous. He was rightfully blasted all over the internet initially, when his own reported testimony had him watching his sister being abducted without attempting to intervene, except by calling 911. Later stories claimed he was an avid hunter and thus had a gun, which makes such a passive response even more unbelievable. I can't help but feel that these updated stories are a clear attempt to publicly make the brother look better. I'm sorry, but in my mind, because the scenario is based exclusively on what he said, and that has not only changed significantly, but has never been the least bit plausible imho, I think the authorities need to concentrate on him.