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Former police data analyst Davin Hall quit the Greensboro, N.C., police force in part over its use of Fog Reveal, a powerful cellphone-tracking tool. “The capability that it had for bringing up just anybody in an area whether they were in public or at home seemed to me to be a very clear violation of the Fourth Amendment,” Hall said. (AP Photo/Allen G. Breed).

Tech tool offers police ‘mass surveillance on a budget’

Investigations Lab in the News —

Associated Press: Tech tool offers police ‘mass surveillance on a budget,’ supported by students Janine Graham, Nicole Waddick and Jane Yang.

Left: Former police data analyst Davin Hall quit the Greensboro, N.C., police force in part over its use of Fog Reveal, a powerful cellphone-tracking tool. “The capability that it had for bringing up just anybody in an area whether they were in public or at home seemed to me to be a very clear violation of the Fourth Amendment,” Hall said. (AP Photo/Allen G. Breed).

Former police data analyst Davin Hall quit the Greensboro, N.C., police force in part over its use of Fog Reveal, a powerful cellphone-tracking tool. “The capability that it had for bringing up just anybody in an area whether they were in public or at home seemed to me to be a very clear violation of the Fourth Amendment,” Hall said. (AP Photo/Allen G. Breed).
Former police data analyst Davin Hall quit the Greensboro, N.C., police force in part over its use of Fog Reveal, a powerful cellphone-tracking tool. “The capability that it had for bringing up just anybody in an area whether they were in public or at home seemed to me to be a very clear violation of the Fourth Amendment,” Hall said. (AP Photo/Allen G. Breed).