IANAL but the warrant part of this will probably not be what will get them. Unauthorized access for the husband and conspiring on the part of the wife seems like the logical path.
Ah, the Gestapo. I hope they enjoy jail, because this still ain't nazi germany yet.
You're betting that someone's going to get a jail sentence for this? Because I doubt it.
The real reason why these actions are rarely punisned is that their supervisors are mainly annoyed that they got caught, not by the act itself.
police often avoid jail for killing people, unlikely this results in anything more than a change of location
Using third party systems like Flock for warrantless police work has not been fully tested in courts yet. With the current SCOTUS, I fully expect them to find it constitutional somehow if it lands there.