I assume police already stores dossiers on reported crimes.
Initially it's a report. Place, time, allegation, supporting evidence.
The question is how much (automated) detection ought to be allowed, what's the retention period, and so on.
Flock is a bad trade-off, but that doesn't mean there's no point in collecting data. If every datum is a semi-tangible report, then the sensitivity/specificity has quite a good change of being high (especially compared to dragnet surveillance with post-hoc data fishing).
Initially it's a report. Place, time, allegation, supporting evidence.
The question is how much (automated) detection ought to be allowed, what's the retention period, and so on.
Flock is a bad trade-off, but that doesn't mean there's no point in collecting data. If every datum is a semi-tangible report, then the sensitivity/specificity has quite a good change of being high (especially compared to dragnet surveillance with post-hoc data fishing).