Comment by jeffbee

Yes, the only sensible comment is downvoted to the bottom of the page. In U.S. jurisprudence "exigent circumstances" gives police all kinds of powers including warrantless searches of all kinds, up to and including electronic surveillance and phone taps.

The "process" to which you are "due" when it comes to these things is if the police try to use this information to prosecute you, they have to explain it in court, whereas if they obtain it through a search warrant, they have to explain themselves in advance. It's all "due process".