Fitbits, pacemakers, Amazon Echoes – all are tools of the modern detective’s trade in a world where our devices are always watchingRichard Dabate told police a masked intruder assaulted him and killed his wife in their Connecticut home. His wife’s Fitbit told another story and Dabate was charged with the murder.James Bates said an acquaintance accidentally drowned in his hot tub in Arkansas. Detectives suspected foul play and obtained data from Bates’s Amazon Echo device