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This story is a collaborative effort of USA TODAY and Gannett newspapers and TV stations across the country.

More than 50 investigative journalists requested public records from local and state police agencies in their communities, seeking records that might shed light on capabilities of civilian police to gather data from people's cellphones.

MORE: Cellphone data spying: It's not just the NSA

MORE: Examples of data-gathering abuses

MORE: Cell data dumps: A legally fuzzy area

Records obtained from police agencies, as well as additional records from online databases of contracts and government proceedings, were gathered to paint a broad picture of the state of cellphone surveillance by police. Many agencies denied records requests.

Gannett newspapers and TV stations are reporting additional details about local agencies.

RENO, NEV.: Investigation into who's watching you and your cellphone data

RIVERSIDE COUNTY, CALIF.: Riverside County Sheriff's collects cell phone data

INDIANA: State Police tracking cellphones — but won't say how or why

ROCHESTER, N.Y.: City won't say if it purchased surveillance equipment

COLUMBIA, S.C.: Tower Dumps in S.C. could give your cell data to police

BREVARD COUNTY, FLA.: Police agencies can grab data from your cellphone

IOWA: Iowa's use of 'tower dump' data shrouded in secrecy

MONTGOMERY, ALA.: Local law enforcement using methods from NSA playbook

LARIMER COUNTY, COLO.: Cellphone data aided in solving two Larimer County murders

SHREVEPORT, LA.: Bossier City, Shreveport police use cellphone data

BATTLE CREEK, MICH.: Cellphone surveillance: New tool in police arsenal

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