The police commissioner appears to be wearing a Sergeant's uniform, with 3 stripes on the sleeves.
When asking Alexa to play the recording, Alexa say, speaker cannot be connected to the internet, firstly Alexa does not actively record and store the conversations, but it's always listening for "Alexa," the wake word. Once you say it, anything you say that follows is recorded and stored in the cloud and cannot be played unless it's connected to the internet.
At 1:42:28, when the smart phone shows a photo of the killer, the content below his photo says "100% MACHTED".
When the facial recognition software is sent to Lisa's phone it displays "100 Machted", instead of "100% Matched".