Alexa, What Is Probable Cause?

More than 50 million smart speakers have been installed in American households. For police, that means 50 million potential virtual witnesses to crimes that occur in the privacy of one's home. But the legal protections for this type of privacy-invading, Internet of Things–enabled evidence are still very unclear. The question matters because one of those smart speakers was just called to be a witness in a brutal double homicide in New Hampshire. Timothy Verrill stands accused of stabbing Christine Sullivan and Jenna Pellegrini to death over suspicion that one of them was a police informant.