How common are body-worn cameras, and what changed when they arrived?

AnalysisPolicing had a recording problem long before cameras: most decisions are taken without a supervisor present and reviewed afterwards through an account written by the person being reviewed. Body-worn video is an institutional answer to that, which is why it arrived as an accountability instrument rather than as an operational tool.

The Bureau of Justice Statistics measured adoption across local police departments in 2016 and 2020. Across all sizes, the share using body-worn cameras rose from 43.1% to 61.8%.

The distribution matters more than the average. Among departments serving 1 million or more residents, use rose from 73.3% in 2016 to 100.0% in 2020 — complete adoption in the largest departments, while the overall figure remained under two-thirds.

The same survey treats body-worn cameras as a subject of written policy, alongside topics such as use-of-force reporting, vehicle pursuits and mass demonstrations — that is, as something a department is expected to have written rules about rather than merely to possess.

Adoption is not the same as governance

Owning cameras and having a written policy on them are separate facts, and the survey asks about both. A department with equipment and no policy has bought hardware rather than adopted an accountability instrument.

The record it makes is different in kind

A written account is the officer’s; a recording is not authored by anyone. That is what makes it valuable and also what makes the rules about access and retention contested.

It does not replace the written record

Documentation equipment remains on issue lists. A recording captures what a camera saw, not what an officer knew, decided or was told — see documentation equipment in policing.

What the rules say is out of scope here

Activation, retention, access and disclosure are governed by policy and in places by law. None was researched, and none is described.

• Common belief: All police officers wear body cameras now.

  In practice: Across United States local police departments, 61.8% used them in 2020 — up from 43.1% in 2016, but well short of universal.

• Common belief: Adoption is broadly even.

  In practice: Among departments serving 1 million or more residents it reached 100.0% in 2020, while the figure across all sizes stayed under two-thirds.

• Common belief: These figures describe policing generally.

  In practice: They describe local police departments in the United States, from the LEMAS survey. Nothing here establishes adoption in any other country or for federal and state agencies.

• Common belief: Body-worn video replaces written records.

  In practice: Documentation equipment remains issued, and a recording captures what a camera saw rather than what an officer knew or decided.

• Common belief: Having cameras means having rules about them.

  In practice: The survey treats adoption and written policy as separate questions, which is why it asks about both.

• Common belief: This page will tell you what body-worn cameras can do.

  In practice: It describes no device, capability or specification. Adoption and governance are institutional facts; capability description would be something else.

United States local police departments, LEMAS, 2016 and 2020.

• All department sizes: 43.1% in 2016, rising to 61.8% in 2020.
• Departments serving 1 million or more residents: 73.3% rising to 100.0%.
• Body-worn cameras surveyed as a written-policy topic alongside use-of-force reporting and vehicle pursuits.
• Not established: adoption outside United States local departments, or in any other country.

AnalysisBody-worn video is unusual among equipment in that its principal beneficiaries are not only the officers carrying it. It produces evidence about how public authority was exercised, which is why the questions that matter about it are governance questions — and why adoption without written policy is the least useful version of it.

• The adoption figures are for LOCAL POLICE DEPARTMENTS IN THE UNITED STATES, from the LEMAS survey for 2016 and 2020. They establish nothing about federal or state agencies, and nothing about any other country.
• What any policy actually requires — when cameras are activated, how footage is retained, who may access it — was NOT RESEARCHED and is not described.
• Whether body-worn video changes outcomes was NOT RESEARCHED. This page describes adoption and governance, not effects.
• No device, model, specification or capability is described anywhere on this page.

Related: documentation equipment in policing, what police equipment is for, and how are police held to account.