I could see this being extremely valuable to law enforcement if they're planning on making an arrest. They're a lot more likely to not get shot by the suspect if they know they're asleep. It's also the sort of thing that's not germane to making their case against the suspect--it's tactically relevant but strategically irrelevant. So we need something more than the 4th amendment here? That's actually a question I'm not a lawyer and don't know what this actually implies. Naively, it seems to me that if information is inadmissible in making their case, law enforcement should have no access to it and, probably, neither should anyone else.