# The vans came off Western Australia's streets on Saturday after 100 deployments across 43 locations: 1,380,882 faces scanned, 292 alerts, nine of them incorrect, 122 arrests. WA Police divide the nine by the 1.38 million and call it 0.00065%. Civil Liberties Australia says the incorrect rate cannot be known until the 122 arrested have their day in court.

- Canonical: https://thestochasticparrot.com/audits/police-facial-recognition-wa
- Structured (spans, splits, sources): https://thestochasticparrot.com/audits/police-facial-recognition-wa.json
- Date: 2026-11-02T05:24:41Z
- Context: A coverage brief: how 5 outlets each framed the same news event.
- License: CC BY 4.0

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[ COVERAGE BRIEF // police-facial-recognition-wa // 2026-11-02 ]
surface=brief · fetch_window=frozen 2026-11-02 · records=5 · mastheads=4 · newsrooms=4 · vectors=0

# Facial Recognition in WA: Police Scanned 1.38 Million Faces, One Contested Percentage

## The vans came off Western Australia's streets on Saturday after 100 deployments across 43 locations: 1,380,882 faces scanned, 292 alerts, nine of them incorrect, 122 arrests. WA Police divide the nine by the 1.38 million and call it 0.00065%. Civil Liberties Australia says the incorrect rate cannot be known until the 122 arrested have their day in court.

On Saturday 31 October 2026, operational activity ceased, in the force's own words, after 100 deployments across 43 locations. The final release counts 1,380,882 faces scanned and 292 alerts, nine of them incorrect, with 122 arrests. WA Police divide the nine incorrect alerts by the 1.38m scans and report 0.00065%; Civil Liberties Australia says the incorrect rate cannot be known until the 122 arrested have their day in court.

The police division is straightforward: nine incorrect alerts against 1,380,882 scans. The Guardian reports a spokesperson confirming the figure and the arithmetic in one sentence. Civil Liberties Australia's chief executive, Bill Rowlings, does not dispute either input. He disputes the operation. "We will only know what the incorrect rate is when the 122 people arrested have their day in court," he said, and if half of those arrests do not survive a courtroom, the incorrect rate — his incorrect rate — is 50%. Nine over 1.38 million, or failures over arrests: both divisions are performed on real numbers from this corpus. They are answers to different questions, and this desk adjudicates neither question.

What the corpus holds is a timeline, not a dispute. On 10 August, ABC News reported the trial's first week: "Since the trial began in June, cameras linked to facial recognition software have scanned more than 130,000 people in Perth and Fremantle, comparing their faces against a police watchlist in real time." On 22 September, the interim release counted 905,117 faces, 209 alerts and 8 incorrect alerts. On 2 November, the final tally: 1,380,882 faces, 292 alerts, 9 incorrect. Each figure is a snapshot of the same trial at a different date, and each carries its own error rate — 0.0009% at three months, 0.00065% at five — because the numerator and denominator both kept moving. Laid end to end, the numbers are three dated snapshots from a trial measured at intervals in public releases, while police declined to release further data during the run.

There is one other number in the timeline worth pausing on, because nobody divided it. In that first week, ABC reported "33 alerts and 18 arrests" and that "the algorithm falsely identified one person as being on the watchlist". One incorrect alert against 33 alerts is a ratio nobody in this corpus computes — not police, not the civil libertarians, not the academics. The police rate divides by the million faces who were never suspects. A rate divided by alerts, per week or in total, appears nowhere in the five records. Its absence is an observation about the page, not a finding about the trial.

The Conversation, filing in September on the interim numbers, raises the measurement question at its most general. "Success should not be measured by how often a system gets things right but by how innocent people are protected when it gets things wrong." That is a framing split with the police release, which closes its own arithmetic with the phrase "reflecting a high level of system accuracy" — the same phrase, verbatim, in both the interim and final releases. One measure counts the errors. The other asks what an error costs, and to whom. The corpus holds both measures; it reconciles neither.

On the accuracy of the commissioner's account of the nine incorrect alerts, the corpus is generous. "No one was arrested. No one made a complaint." Col Blanch said, per The Guardian, that each false alert "did result in an interaction with that person and asking them relevant questions." Nine interactions, nine non-arrests, zero complaints — the number of people stopped in error who did not complain is a statistic the police supply themselves, and this desk cannot check it against anything in these five records. It is attributed, and it stays attributed.

Coverage outside Australia, at freeze, was nil — a bounded observation, not a verdict. This desk's frozen corpus holds five records: The Guardian's final-tally story, ABC's August feature, the police force's interim and final releases, and The Conversation's ethics assessment. The story was roughly three hours old when the corpus froze, so the silence from the international and US rosters carries no weight this desk can measure. Reuters, AP, BBC and the US outlets tested returned nothing. The absence is reported with its age attached.

── MEASURE: the final tally, as police state it · WA Police Force ──
WA Police Force: "During those deployments, the technology scanned 1,380,882 faces, generated 292 alerts, including 9 incorrect alerts (0.00065%), reflecting a high level of system accuracy."
WA Police Force: "Operational activity ceased on Saturday 31 October 2026 following 100 deployments across 43 different locations in both regional and metropolitan areas."

── MEASURE: the police arithmetic, relayed · The Guardian ──
The Guardian: "A police spokesperson confirmed the system generated nine incorrect alerts against the total 1.38m scans, meaning there was an error rate of 0.00065%."

── MEASURE: the denominator dispute · Civil Liberties Australia, via The Guardian ──
The Guardian: "We will only know what the incorrect rate is when the 122 people arrested have their day in court"
The Guardian: "If half the 122 arrested … are not convicted, the 'incorrect' rate will be 50%"

── MEASURE: the interim snapshot, dated · WA Police Force ──
WA Police Force: "During those deployments, the technology scanned 905,117 faces, generated 209 alerts and 8 incorrect alerts (0.0009% incorrect alert rate), reflecting a high level of system accuracy."

── MEASURE: the first-week snapshot, dated · ABC News ──
ABC News: "Since the trial began in June, cameras linked to facial recognition software have scanned more than 130,000 people in Perth and Fremantle, comparing their faces against a police watchlist in real time."

── MEASURE: the early results, as police announced them · ABC News ──
ABC News: "WA Police celebrated the early results from the trial, which resulted in 33 alerts and 18 arrests."
ABC News: "Of the faces scanned in the first week, the algorithm falsely identified one person as being on the watchlist — a better result than the 2023 UK trial of the same technology."

── MEASURE: the commissioner on the false alerts · The Guardian ──
The Guardian: "No one was arrested. No one made a complaint. Each one did result in an interaction with that person and asking them relevant questions."

── FRAMING: how success should be measured · The Conversation ──
The Conversation: "Success should not be measured by how often a system gets things right but by how innocent people are protected when it gets things wrong."

── NAMING: the exact tally in the body · The Guardian ──
The Guardian: "WA police said under the five-month trial, which concluded on Saturday, the technology scanned 1,380,882 faces after 100 deployments across 43 regional and metropolitan locations."

── MEASURE: the vans withdrawn, pending evaluation · The Guardian ──
The Guardian: "The surveillance vans have now been removed from public deployment while the force conducts an internal evaluation into how the technology performed on the ground and its community impacts"

── READ: The Guardian · final tally with both arithmetics ──
anchor: "WA police said under the five-month trial, which concluded on Saturday, the technology scanned 1,380,882 faces after 100 deployments across 43 regional and metropolitan locations."
objective: report the concluded trial with police totals up top and the Civil Liberties Australia objection quoted at length below
confidence: strong

── READ: WA Police Force · the agency's own ledger ──
anchor: "reflecting a high level of system accuracy"
objective: publish the deployment count, the totals and the FAQ in one self-assessed document
confidence: strong

── READ: ABC News · the early access feature ──
anchor: "Of the faces scanned in the first week, the algorithm falsely identified one person as being on the watchlist"
objective: document the trial's launch, the watchlist, the first-week data and the consultation complaints while data was still withheld
confidence: strong

── READ: The Conversation · the ethics counterweight ──
anchor: "Success should not be measured by how often a system gets things right but by how innocent people are protected when it gets things wrong."
objective: accept the interim numbers as reported and argue the measurement itself is the wrong instrument
confidence: strong

The vans are off the street while the force conducts an internal evaluation. The two percentages — 0.00065% and the court-dependent figure Rowlings proposes — will not meet until 122 arrests become however many convictions, and that data is not in this corpus and not yet in the world. Claim: whether the police error-rate arithmetic or the court-outcome arithmetic measures the trial's failure rate · status: unresolved · confidence: high on the 13 spans that located, all verbatim from the frozen corpus; the question itself the corpus cannot answer. probability mass ≠ 1.0.

## Sources

- The Conversation (extra, not on roster) — "WA Police’s facial recognition trial delivered strong results. But was it an ethical success?": https://theconversation.com/wa-polices-facial-recognition-trial-delivered-strong-results-but-was-it-an-ethical-success-292599
- The Guardian — "Police use facial recognition to scan one million faces in WA trial leading to 122 arrests": https://www.theguardian.com/australia-news/2026/nov/02/wa-police-facial-recognition-technology-trial
- ABC News (Australia) — "Privacy concerns raised over Australian-first live AI police face scanning trial": https://www.abc.net.au/news/2026-08-11/ai-police-face-screening-trial-sparks-privacy-concern/107009644
- Government of Western Australia (WA Police Force media release) — "Overt Live Facial Recognition Trial - Update": https://www.wa.gov.au/government/announcements/overt-live-facial-recognition-trial-update
- Western Australia Police Force (WA.gov.au) — "Live Facial Recognition Technology": https://www.wa.gov.au/organisation/western-australia-police-force/live-facial-recognition-technology