you think they’d have to sift through the data manually? LOL
no.
voice recognition will find key phrases they’re interested in. it’ll feed into a phrase database to ‘rate’ your conversations and map them through time. this will allow them to see the pattern of rhetoric as it changes. they will also be able to overlay your movements, tracked by your cell phone, with the movements of others to find your acquaintances.
most of this already exists. whether or not its admissible in court is a different issue.
Australian Woman Accused Of Squirting Breast Milk On Police Officer (denied bail)
Free Erica! she's being unjustly detained. :(