Police demanding “tower dumps” of data from cellcos is far too broad, says judge

TORONTO - Police in Ontario will have to be careful when they ask a judge to order cellular carriers to hand over data records of phones that use particular cell towers in the province, a judge has ruled.Law enforcement agencies want such data, including personal information on subscribers, to track the movement of suspects and who they are contacting.But Justice John Sproat of Ontario's Superior Court of Justice ruled Thursday that a 2014 order by a justice of the peace telling Rogers Communications and Telus Corp. to turn over records for all phones activated, transmitting and receiving data through 21...