Amazon's Echo and Echo Dot are in millions of homes now, with holiday sales more than quadrupling from 2015.  Always listening for its wake word,  the breakthrough smart speakers boast seven microphones waiting to take and record your commands.

Now, Arkansas police are hoping an Echo found at a murder scene in Bentonville can aid their investigation, CNET reports.

First reported by  The Information , investigators filed search warrants to Amazon, requesting any recordings between November 21 and November 22, 2015, from James A. Bates, who was charged with murder  after a man was strangled in a hot tub .

While investigating, police noticed the Echo in the kitchen and pointed out that the music playing in the home could have been voice activated through the device. While the Echo records only after hearing the wake word, police are hoping that ambient noise or background chatter could have accidentally triggered the device, leading to some more clues.