Perhaps the kidnapper stopped there while carrying NG's body to grab the Ring camera.(ETA: From looking at the brief video provided a few posts above on blood droplets on front walkway):
There is a flurry of drops and smudged (?) drops right there within a foot or so of the key side of the front door. The droplets further out are more spread apart.
Is this the door NG would have gone in through when delivered to her home after Saturday night dinner? Was she dropped off in the driveway? Or, was she walked all the way to the door?
Could she have been attacked right there as she put her key into the lock of her front door upon arriving home? Were her house keys found? Any blood on them?
It's been reported that she was attacked while in her bed. Her Pacemaker stopped syncing with her Apple watch @2am Sunday morning.