These guys will be caught very soon.
This is one of the nice things about having offsite storage like with Dropcam. In this case they seem to have been too stupid to even see the camera at all so it was moot, but at the point they move it, had they taken it they'd already have been caught on camera.
There's enough evidence there for jail time for sure.
EDIT: I didn't watch it in entirety before. So they saw the cam but didn't understand the technology about it and were dumb enough to keep it running the whole time while trying to compel this woman forcibly to tell them where the footage was.