Freedom of information request finds six-month trial cost £320,000, used almost 100 police hours and led to just one – incorrect – alert

506 points•ilamont•1 day ago•301 comments•

301 comments

blitzar1 day ago
16 deployments for 6 months at rail stations - they must have been off 99% of the time to only scan 500k faces.

For scale 500k people is 2 days of Liverpool Street Stations daily average

mrweasel1 day ago
A lot of those are going to be the same people day in and day out, the article says 500k faces, not people. You also have to filter out those people where the cameras aren't getting an image good enough to scan.

The article doesn't say, and I haven't seen the cameras, but it's not like you're getting every single person parsing through those stations.

But, yes, the numbers seems low.

matteason1 day ago
BTP say [0] that "the images and biometric data of those who don’t cause an alert are automatically and immediately deleted." - if that's true, they shouldn't be able to tell that it's the same faces being scanned multiple times so it has to be 500k total scans rather than, say, 500k unique faces across 2 million scans

[0] https://www.btp.police.uk/police-forces/british-transport-po...

blitzar1 day ago
Digging in it cameras were deployed 21 times for about 4 hours each time ... matching against a watchlist of around 400 faces.

Sounds like it was intended to achieve the outcome it achieved - a near zero false positive rate. If I were a betting person, I would wager the threshold for a match was set comically high.

https://www.btp.police.uk/police-forces/british-transport-po...

mtrovo1 day ago
They're quite tall an positioned just after the barriers so I would believe they're quite effective on capturing faces. https://images.ctfassets.net/pjshm78m9jt4/29ok6Erlnhk6WIqP3w...
LastTrain1 day ago
OK, so turn them on 100%, scale (your numbers here) the results out to 50 million faces. Now you have still caught 0 criminals and you have 500 false positives.
And they allow people to walk around them with a labelled route, so you see all the criminals just walk around it.
flumpcakes1 day ago
Perhaps not many criminals use train stations during the day, for example, people probably deliver drugs by bike or car so they don't walk around a busy place stinking of weed.

How many known criminals have biometrics of them in the first place?

Of the criminals that do have identifiable biometrics, do they operate in that area?

We also don't know the false negative rate. Perhaps it's very high in order to keep the false positive rate as low as possible.

These are things pulled out of thin air that could easily explain why 500,000 face scans (not people) provided no arrests/identifications.

The biggest reason probably being as you said... it was clearly marked. Honestly I would be shocked if they found a criminal dumb enough to walk past it, but not dumb enough to have yet to be caught.

iamacyborg1 day ago
How many unique faces though
megous1 day ago
It's called sampling. It works. :)
balderdash1 day ago
my mom lives in small town that only has two roads in/out of town and the police have alprs on those. there's no violent crime there, and all the police department does is traffic (DWI's, speeding and parking tickets, and accidents) and respond to small town crime (noise complaints, stolen bicycle, stray/lost dogs etc). I think the only thing that the alpr has ever caught people for is out of date vehicle registrations - but now the police department wants a flock camera because they are "great crime fighting tools"
ANPR catches lack of MOT, road tax, and insurance. They also alert on wanted cars.

They are a good thing to have in general, the issue with those things is always data retention and access by authorities. Currently I think that data are retained for 12 months so, for the sake of argument, let's say you commit a serious crime now and only come to the attention of the police in 10 months, well they can still query all of your car's movements at the time of the crime from the ANPR network's database...

superxpro12about 9 hours ago
my proposal to fix the ALPR issue in general focuses on the information asymmetry. The real reason people hate them is because only government forces have access to them, thus creating an unfair advantage.

My solution to this is to make every ALPR database openly and publicly searchable. It solves every problem with them today.

Government abuse? Well now the people can find out where all the politicans are.

False positives? the data is right there. go ham.

Oh no now the police say THEY dont want to be tracked??? Problem almost solves itself.

antonvs1 day ago
> They are a good thing to have in general

Perhaps, but not the way Flock does it. Transparency, oversight, controls - all essentially just missing.

"Disruption" to these people means "try to sell the most legally questionable service possible until we get slapped down by the society we're trying to extract money from."

baliex1 day ago
> the police have alprs

> there's no violent crime there

Cause and effect, no? /s

andrepd1 day ago
The bear tax is working
balderdashabout 12 hours ago
There was no crime before the alprs, no crime after
jihadjihad1 day ago
Username checks out?
jwally1 day ago
I was thinking about this with flock cameras the other day...what's our actual ROI? Was the world horrible before and these initiatives are going to close a monster crime gap or is this just a giant fishing expedition ... just because?
Not for fishing, it's a control system.

Think back to the capital riots/insurrection/what-ever you want to call it; they used similar systems to identify and arrest those participants. Heavily publicize how many people and who; doesn't matter if you a 63yo grandmom or a pastor, we will find you and prosecute. Showing that you are prosecuting the "normal" people is part of it, show that and you make them less likely to show up to the next thing, less likely to provide support.

The Capital has many cameras owned by the feds, so they could easily do that. Chicago, Atlanta, LA not so much. When anti-ICE action takes place with protestors in black block, going under umbrellas, makes it hard to identify and prove. With strategically placed cameras, you can see what cars came in the area. You get statistical data that shows if they are there normally there. Get enough abnormality and you get enough for a search warrant.

You mean the group that live-streamed themselves trying to overthrow the government? Yeah this isn't the same thing at all
lotsofpulp1 day ago
Seems strange to use prosecuting a group of people attacking the democratic process, the basis of the country and a clearly treasonous act, as an example of cameras being used to “over” prosecute to intimidate the public.

Why should it matter if you are a 63yo grandmom or pastor?

tantalor1 day ago
Good?
pj_mukh1 day ago
Can we cut to the bone a little bit? The recent crime panics are not about a partner assaulting their live-in partner or a random home burglary. There is no real "ROI" to be had.

It's purely about the unease of living in chaotic cities, the random stabbings, the shoplifting, the visible homelessness etc. Flock is the stopgap here.

Partly the "feeling" of chaos is just that, a feeling, driven significantly by algorithmic feeds feeding us every random crime from around the country 24/7. Husband murders wife in a murderous rage? No one hear's about it. Mentally ill man murders a woman on the train in a Tier 2 city, immediate nationwide breaking news.

The other part though is a real dissolution in how we take care of our mentally ill. Complex topic [1].

I think complaining about Flock is complaining about the symptom. Today we dogpile on Flock to get it cancelled, tomorrow the public will reach for something else. We have to fix the underlying disease, which is a combination of the two factors above.

[1]: https://time.com/6265241/america-care-of-mentally-ill-people...

altacc1 day ago
In the UK there is a yearly survey regarding crime and I've not read it for a few years (I've emigrated) but a regular theme used to be that people interviewed personally felt safe and weren't likely to be victims of crime but thought everyone else in the country was less safe and everywhere they didn't live had higher crime than it did.

The public perception of crime is persistently incorrect for many if not most people and this incorrect, emotional rather than evidence-based view of the world is unfortunately what drives political pressure.

nemomarx1 day ago
Some of this stuff does feed into the perception though. Flock provides more footage for media to clip, for example. Or you can look at Ring cameras and people getting worked up about joggers or neighborhood kids because now they get alerts and have neighborhood chat groups, etc.
jacquesm1 day ago
> Flock is the stopgap here.

What exactly have they stopped?

Izkata1 day ago
> Mentally ill man murders a woman on the train in a Tier 2 city, immediate nationwide breaking news.

Unless this happened a second time, it wasn't really reported on much until after it blew up on social media.

> Today we dogpile on Flock to get it cancelled, tomorrow the public will reach for something else.

Who's the "we" in this sentence? The people who want to keep cities crime-ridden? And why does your opinion matter more than that of the public? I thought these "we" were pro-democracy?

nsagent1 day ago
I truly think it's safetyism. People seem to have a lower and lower tolerance for risk as society gets safer.

Since governments are run by people, this safetyism has become enshrined in law, typified by nonsense like criminalizing free-range parenting and mass surveillance.

treis1 day ago
They're absolutely being used to solve crimes and arrest people. Here's two examples:

https://www.cbsnews.com/atlanta/news/flock-cameras-help-iden...

https://www.wsbradio.com/news/local/cobb-police-credit-new-t...

There's some studies showing support but it's very hard to attribute cause to a crime rate that constantly fluctuates and has a myriad of causes

Well, they aren't really for stopping crime. They're for identifying political dissent so it can be crushed early. Stopping crime requires manpower that costs money, and if they were successfuy they'd have a harder time making the case they need even more surveillance beyond the currently monstrous amount no one could have even imagined 40 years ago.
benbristow1 day ago
I've had an idea in the back of my head but I'm no businessman so have this one for free.

Build an AI model, train it from the catalogues of JD Sports and Sports Direct (and other brands like Stone Island etc.) and how to detect balaclavas, illegal electric bikes and e-scooters. Have it link to cameras and do a percentage chance using machine learning on chance of crime. Also increase the percentage if a 'wheely' is done (riding only on back wheel).

Would minority report the majority of crime in this country in one fell swoop.

Could call it ScroteScanner.

Some would call it discrimination but the majority of ASB I see around my area are people dressed/using those exact things.

If they start to catch-on (unlikely) then worse case we have a fancier looking society with gangsters in suits again.

Waterluvian1 day ago
They should just round up and imprison all the people who walk in my neighbourhood.

Some would call it discrimination but the majority of people who commit crimes in my area are people who can walk. I rarely see the wheelchair crowd pulling off B&Es.

Oh, or people who wear clothes. Criminals seem to like wearing clothes. Point proven: you never see nudists shoplifting Old Navy.

benbristow1 day ago
People on illegal escooters or illegal electric bikes are already committing crimes, there's rarely a decent reason to be wearing a balaclava in the city.

As I said, machine learning to take all these pointers into perspective.

someonebaggy1 day ago
I think they do that in American suburbia
mtrovo1 day ago
I would love to see a similar model trained on the Forbes 30 under 30 to catch all the young financial creatives wearing Patagonia gilets.

It would probably pay for itself.

benbristow1 day ago
Can't say I disagree.
maeln1 day ago
Having lived in shitty neighborhood all my life (not in the UK tho'), I find this pretty laughable. First off, you would be surprised at how petty criminal caught on police tactic fairly quickly and find way around them. But in general, you will just get petty criminal. Sure they are a nuisance, but more a symptom than a cause. And let's say we do just that. You arrest thousand upon thousand of balaclava-wearing, e-scooter driving dudes. What do you do then ? Most of them will have to be released because, well, they didn't do anything. You might catch some of them with minor charges like drug possession or possession of a knife or something. You successfully wasted thousands of police and justice man-hours for a few petty charges which won't change anything. “Solving” crime is a hard problem, and one with 0 simple solutions and many, many things we have to work on as a society. Your idea is a net negative in prertty much all aspect.
ang_cire1 day ago
I think you're missing the real intent of their proposal, which is not to give them due process and release them. Their other comments make it very clear they just want certain people to be gone from their local spaces.
dhx1 day ago
There is plenty of criminology research, including research focussed on long term use of surveillance cameras in London, that supports what you've said.

- Many perpetrators are committing crimes with alcohol and drug impairments, mental disabilities, and as "crimes of passion". You could point 1000 cameras at the scene of the crime and many perpetrators are not going to notice nor care about the cameras. Unfortunately for surveillance camera proponents it's typically the crimes most warranting prevention and investigation (e.g. crimes such as assault) that are impacted least by surveillance cameras. Surveillance cameras instead have been found to have some deterrent effect on minor property crimes (e.g. theft of bicycles or cars) but whether the state is going to invest the resources into investigating and convicting someone who stole a <$1000 bicycle is questionable especially when insurance exists and the onus can then be placed back on property owners to do more to secure their property from thieves.

- Perpetrators were being convicted without use of surveillance cameras and can continue to be convicted without use of surveillance cameras. There may be some argument that surveillance cameras help reduce the cost of getting a conviction (e.g. less evidence needing to be captured?) but not much support to the idea that conviction rates are higher. Quite often the courts, corrections system, government (for funding), etc will push back for a number of reasons--lack of funding for courts to hear minor cases, lack of funding for correction systems, correction systems being found in their current state of funding to have adverse impacts on future criminality, etc.

- The cost-benefit of operating surveillance cameras versus the cost-benefit of spending on other areas of policing (or just public spending in areas such as education and welfare) is hotly debated. Total cost of ownership for each surveillance camera is typically a lot more than people may expect, particularly due to the labour cost of reviewing and processing stored surveillance camera footage. There are of course all the other obvious costs too--camera equipment every X years, poles, cabinets, electricity conduit installation, data cable conduit installation, wireless repeater installation including leases, backhaul data costs, data centre hosting costs, labour costs for support/operations staff--none of this is cheap. What if this same funding was instead invested in other programs--would there also be reduced crime levels some years in the future?

[1] https://en.wikipedia.org/wiki/Closed-circuit_television#Crim...

igleria1 day ago
Technically you are proposing targeting poor people with extra steps. charming.
benbristowabout 24 hours ago
Have you seen the prices of clothes from the stores I mentioned? Not cheap unless they're knock-offs.
trashb1 day ago
You may want to check your numbers and remember there is a huge negativity bias on crime.

It seems the sense of safety is often different from the actual numbers especially when stereotypes are involved as shown in parent comment regarding to e-scooters. To such an extent that there is the phenomenon called the crime decline paradox.

https://www.kcl.ac.uk/news/public-perceptions-of-crime-at-od...

gadders1 day ago
You also need to factor in how the police won't actually turn up for most crimes, so there is no point reporting unless you need to do so for insurance policies.

Also, clicking through, you can see the whole report is some panglossian delusion aimed at making Reform supporters look bad.

whatever11 day ago
Man we technologists are so bad at dealing with societal issues.

We try to reinvent something that claims that keeps tabs on everyone and for sure will punish you if you don’t behave well but will reward you if do!

The thing has a name. It’s the religion.

graemep1 day ago
That is true of some religions - e.g. moralistic therapeutic deism. It is sort of true of Buddhism because of belief in karma, but that is an automatic mechanism rather than a punishment.

It is not true of Christianity, which promises forgiveness, nor of the other Abrahamic religions.

whatever11 day ago
Not a theologist, but pretty sure that the default destination for the bad Christians is hell.

There is an out-of-hell card you can get if you pay your dues to the local enforcement branch (before you die, they need today’s money not after life checks)

ozyschmozy1 day ago
This is a take I hadn't heard before, pretty interesting. I wonder if there are already any fiction out there where some widespread religion turns out to be an automated mass surveillance and policing system gone awry. Neat concept
Tarq0n1 day ago
> "The need to be observed and understood was once satisfied by God. Now we can implement the same functionality with data-mining algorithms."

> "God and the gods were apparitions of observation, judgment and punishment. Other sentiments towards them were secondary."

> "The human organism always worships. First it was the gods, then it was fame (the observation and judgment of others), next it will be the self-aware systems you have built to realize truly omnipresent observation and judgment."

> "The individual desires judgment. Without that desire, the cohesion of groups is impossible, and so is civilization."

> "The human being created civilization not because of a willingness but because of a need to be assimilated into higher orders of structure and meaning."

> "God was a dream of good government."

> "You will soon have your God, and you will make it with your own hands."

- Morpheus ( Deus Ex, 2000)

brink1 day ago
Humans are inherently religious, whether you see it or not. We all worship something.
zug_zug1 day ago
Yeah following on this, when you look at places that actually are low-crime it's almost always cultural. But if all you have is a hammer everything looks like a nail I guess.

Read the full thread on Hacker News →

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