No disclosed evidence of anyone having been there. No forced entry.
Random B&E. Vehicle there and lights on, low probability.
Targeted robbery. Unlawful substances, etc, there would be little reason to take her and conceal. Being shot at, and still taking her, lots against it.
Wrong target robbery. They go after Lundy, a couple hundred miles from where he lives, to a place he's only recently become affiliated with. Event transitions to a kidnapping. I'd really hope they have a watch on BF's phone activity. Still not much to go on.
Revenge for prior fight. Distance and time elapsed, gunshots, concealment, all against.
Face/head shots bleed. A lot. There's the possibility she could see them, if a vehicle with it's lights on was in the drive. Remote parking and carrying off a struggling person, I doubt.
Least amount of "ifs & buts", ASOC, runs in to the river. Dogs didn't seem to pick up anything, but her scent would have been all over. Their K9 search area seemed only very close, and not sure what level of cross-training. Thermal imaging was used, but quality and extent unknown. A submerged body may not show up.