UK Runs Knife Detection Outdoors
UK police use "knife arches" or "knife detectors" for pedestrian screening aiming to reduce knife violence but how effective is it?
This report reviews what the UK police do to prevent knife crime including:
- Why the detectors were installed in the first place
- What "Knife Acrhes" and "Knife Detectors" are used by UK police
- How these devices are used based on our interviews with the manufacturer of the detector
- Limitations of this approach
- Its effectiveness based on the knife crime data
Executive *******
***** ** ****** ****** ********* ******** in ******* ******** ** ******* ****** dozens ** ******** ** ********* ** the **** ****** ******** **** *********, there ** “******* ********” **** *** use ** **** ********* ******* ** a ******** ** ***** *****, ********* to *** ******* *** ***** ******* of ********.
***** ********** *** ***** ******, ******** to *** ****** ** ****** ********. While ** ** **** ** ******** the ***** **** *** ***** ********, multiple ******** *** ******** *** ******** (IPVM ********* * ******** ******* - two ************ ******** *** *** ******* officers **** *** ********) ** **** as ******** ******** ******* ******** **** ~$3,000 ** ~$**,***.
**** ** *** **** ******* ******* divestment ** ******** ********** *** *** prone ** ***** ******, ***** ******** the ************* ** *** *********. ***********, available ****** ** ****** ***** ******* metal ********* **** * *********** ****** of *********** ****** ** *** ** police, ***** ****** ********* ***** *** efficacy ** **** *********.
**********
** ******* ****, ****, ****** ** * "***** ********"** * ** ****** ****** ** the ******* ****** ********* #******************** (**** ****** ********* ** *** ****** of *********** *.* ******* *******) ****** ****** interest ** *** ****** ****** **** deployment *** *** *************.
Deployed ** ****** ***** *****
*** ************ ** **** ** ** the ** ******** ******** ** ** "knife ******" (******* ** *** ****** shape ** *** *****) ** "***** detectors" ** * **** ** *** police's *****-***** ******** ** ********** ***** crime.
**** ********** ********* *** ** **** proactive *** ******** (*.*. ***** * stabbing ** *** ************ ** ****** screening ** * ************ **** * high ***** ***** ****), ** ******** providers ** "***** ******/*********" **** ****.
**** ********* ** ********* *********** ******** *********** ** *** ********* ****** ***** ** ** *** website ** **** ** *** "******** week ** *************** ** ****** ***** crime" ***** ******** ** ** "********* Sceptre" ** **** ****** *********** ** England *** *****.
**** **** *** *** ** *** 43 ****** *********** ** ******* *** Wales ***** ** **** *************** ** Operation ******* *** ***** ***** *** also ******** (*** ******* ************ ****** department***** * ******* ******** ** ********* Guardian).
Results ** ******** **** ***** ********* / *********
** * ****** ** *** ******** 2022 "**** ** ******", ***** **** more **** *,*** ****** ******* **** the *******, *******, ~**% ** ***** were ******* ** ********** ***** **** pedestrian ********* (***** ******* **** *** knife ********), ********* ** *** ******** Police ***** ******* (****)***** *******.
*** ***** ****** ********* *********** **** for *** ****** ******, *** *** release:
* ******* ** ***** ******* **** used ** ******; ********* ******* ******, knife ****** ** ****** ****** *** events *** ‘*******’ **** ** ****** knives *** *** *******.Officers ****** *** ******, a decrease of 26% since the last Operation Sceptre week in May 2022, and 6,380 were either surrendered or seized during sweeps. [emphasis added]
****** **** **** ** ******, *,*** people **** ********, "** ***** *** were ******* ** ***** ***** ********", according ** *** ****.
Illegal ** ***** * ***** ** *** ** *********
***** **** ** ********* ** ***** **** ****** ** public, *** ***** **** ** ********* ** **** ****** ** ****** younger **** ** ***** ***. ** ********** ******************* *** ***** ** ****** **** are ******* ** ***** ******:
*** ** ********** ******** **** "**** reason[s]" ** ***** * ***** ** public ******* ******** ** "*** **** work", "*** ********* *******, **** ** the ****** **** ***** *****", *** "as **** ** *** ******** *******". Additionally, ****** **** *** ***** **** 100 ***** (****** *** ***** ******) are ****** **** ***** *****.
Jail, ****, ** **** *** * ****** *******
***** *** ****** ***** **** *** applied ** *********** **** *** ****** with ***** ********** *** *** ****** time, ********* * ***** ** **** and/or ** "********* ****", ** *** UK ******************* *** ******* *******.
What ** * "***** ****/********"
******* **** *** **** ** *** UK ****** ******** ** ** "***** arches/detectors" *** ****** ****-******* ***** *********, ferromagnetic *********, ** "******* *********", ********* on *** **** ** ****** **** is **** ** *** ******.
*** ******* ***** ***** ******** ** such ******* **** ** *** ** Police:
*********** *** ***** *******-*** *** *** two ******* **** **** ** ***** devices **** ** ******. ******, *** portability ****** (*** ************ *** *******-*** aspect) *** ********** ** *** ** police ** ******** **** *****. ********,*********, * ******* **** ************ **** of *** ******* *** **** *******, confirmed ** **** **** ***** ******* as **** ** ********* ************ **** chosen **** *** ********* ************.
*** "***** *********" *** ********
***** ********* *** ******* ** ** installed ** ********* (*) "**** * throughput ** ****** ****** ** ** used ** ******",*** (*) "**** ********** ************ ************* and ****** ****** ** **** *********** who ******** ***** *** ***** ****", according ** ******* ***** ***** ******* ******* ************ ** ******* ** ********.
*** ***** **** ******** * **** for * "************ **** *********" ** which ****** *** ******** ** * "violent-crime ******* **** ** * **** centre". ***********, ** **** ************ ********* knife ****** *** ******** "** **** ****** ** *** **** (Thursdays, *******, *** *********) ** *** three **** ****** ***** ****** ** the *****-**** ************* **** ******* * pm *** ****, **** **** ****** arrive *** ** ******* ***".
*** ***** ****** *** ******** ** both ******* ******** ****** **** *** detector ****** *** ** ************ ******** that *** ****** ** **** ******** from *** ******** ********** ****** *** are ******** ******** *** **** (*.*. turned ****** **** *** *** ****). For *** ************ ******** ********* ** be *********, *** ****** *** ** deployed ** *** ****** ***** ** is **** ** ******* *** ********** flow.
***-**** *********** ******* ****** ** ** through *** ******** *** **** ********* used, ** *** ******* ***** *****:
Police ********* ***** *********
****** *********** ***** ******** *** ***** arch ********* ** ***** ********, ** the ******* ***** *****:
******** *****-******* ************* ***** ******* ** ***** ********* and ********** ** ** ********** ****** annoyance *** ********* ***** *** ***** a ***** ***** * ****** **** of ***** ********:
*** ****** ***** ************** **** ******* for **** ******** *** *** ***** of *** ********** (*****, ***** ******, posters, ****** *****), ********** ******* *** year. **** ** ****** ** *** to ****** *** ****** ********* ** any ************* ****** ** *** ******* arches *** ****** ** **** **** that ***** *** ***** ***** ****** know ** *** ********* **** **** they *** **** **** ***** **.
**** ************* ** *** ****** **** characterized ** **** ** *** ******** providers ** * "** *****" ***** for "****** *********** **** ****** ** actively ******* *** ******" *** ** a "********* ******** ** *** ******".
Not ******* ******** ** ** ******* * ***** ****
*********** ** *** ** *** *** legally ******** ** ** ******* * knife ****, *******, ***** ************* ** do ** ***** ** **** ** grounds *** * ****** ******. ********, since *** **** *** ** ********** lifted *** ************ ** "**** *** search", ******** ****** ******** ** ******* “no *********” **** *** ******** ****** than ********* **** ** **** “********** grounds” ** ******* * ****** **********, as*** ********* ********.
****-******* ********* ** ***** *********
******** ** ***** ***** ** *******, walk-through ***** ********* *** **** ***** highlighted ** ******* ****** ***********. ***********, with **** ********** ***** ****** *********** used********************** ***** *********, ****** *********** **** either ******** * ******* ******* *******, **** ****** ** ***** ********. ***** ******* **** * ****** capability (******** ** ************ ****-******* ***** detectors) ** **** **** *** ** disassembled *** **** ****** *********** **** some ************ *******.
*** ******* ***** ***** ****** * Scope ** ********* *** ************ ******:
***** *** ******* ***** ******** ** a ******** *** **** *********, ********* the ******* ****** *** ******** *** negatively ****** *** ********* ***********, ** an ******** ****** **** **** - see******* ********* ** *********** ********** *****.
**** ** ***** ******** ***** *** spotted ** **** ****** **** *** police ** "**** *******" ** ****** M ***** *** **** *********, ** a ** ********* *************************** ****. ************** ****** **** ** are **** **** **% ***** ***** than ****** * ***** -£*,****** **** ** **£*,****** ****** * *****.
************* ********* ** ***** *********
*** ****** ***** **** ******** *** debate ****** ** ***** ********* ************* detector,********* ****, *** *** ******* ********* ** IPVM **** **** ****** ********* *** the *******’* ********* *** ********** *********, however, ***** ******** -********* *****.
************* ********* *** ******* ******** ******* that *** ******** ** ****** ****** objects **** ******* **** (****** ** Latin), ***** *** ****. ****** ************ walk-through ********* **** ******** ******** ***** for ****** *********, ******* ******* **** on ************* ** *****’* ******** *****. This ***** **** *** ********* ** abilities ** ************ *******, ******** ***********, etc. - *** **** ******* **** ****** ********* ********** ************ * ********* ** *** ********** and ************* ** ***** *** ******** approaches.
* ****** ************ ***** *** * digital ******* *** *** **** ******* difference ******* *** ***** ******* **** is ********* **** ** *** ****** and *** *** **** *** ****** photo.***** *** ******* ** * **** crucial ******* *** **** ********** *********, localization ***** *** ********** ****** ****** resolution.**** **** **** ** *** ***** devices **** ** *** ** ******, for *******,**** ******** "******* ********", ** *** **** ****** ************ capabilities.
********* *** *** **** ** ******* an ***** ****** ** ********* ******* used ** *** ** ****** *** pedestrian ********* *** ****** **** **** that *** ****** ** ** *** range ** ******** ****** **** *********.
"****-**********" ********* **** *********
** ********* ********* **** ******** *** small ****** ********* *** **** ***** on ******** ******* (**********, **** *******, etc.) ***** ******* ******* * "****-**********" during *** *********, ** ********* ******** Of ******** ************** ******** ****.
********** ********* *** ******** *** *** detection ** ***** ****** *****, *** example,****** *** ***** ********** *******, *** flash ****** ** ****-******** **********, ******* in *********, ***.), *** ***** ** means ** *** ****** ****** ** pedestrians, ** **** ***** ** * high ****** ** ***** ******.
**** ********* **** **** ***** ***** devices ****** *** *********** ** **** metallic ******* **** ***** ******* *** put **** ** *** *** ********* away **** *** ********, ** *** detector ***** *** **** ******* ** the ******* ** ****. *** ******* do *** ***** ** *** ******* in **** ** **** *** ** longer ** *** ********'* ********* ****, as *** ******* ***** *****:
** **** ***** **** *** ******** screening *** ** ** **** **********.
"Weapons *********" ** ***** *********
** *****, "******* *********" *** *** most ******** ******* *** **** ********* as **** *** ******** ** ******* that ** *** ******* ********** ** everyday ******* ***** ******** ** ******* such ** ****** *** ****, *******,**** ************ ** **** ** *** ** police *** **** ***********.
******** *** ************ ********* ** ******* knives, ** *********** ****** ******** ********* ** *** result ** ***** *******. **** **** *** ****** ******** said **** ******** *** *** ************ detect "****** ****** ** * ****** less **** *'' ****** ******" - knives **** *** *********** ***** ** carry ** *** ** - *******, the **** ***** ********* **** ******* to ** ****. ************, *** *******'* marketing ********* **** ****** *** *** the "********* ******" *** ***** *******, but ****** "*****-******* ******* *** ****", which ***** ******* ******** **** ***** detection ** *** ********** (********* *** company ***** **** ******** ****** ** detection *******).
*** **** ** ****** ************ *** inconsistent ********* ***** ** ******* ****** are *** **** ******* *********** ** this ******. ***** ******** ** ********** to **** *** ******** ******** ***** rate, *** **** ** ****** ************ will ******** *** ********* ********* *******.
False ****** *** ********** ** ******** *****
** ******, *** ***** ***** ** devices (****-******* ***** *********, ************* *********, and ******* *********) ****** ****** **** a **** ****** ** ***** ****** (and **** ******* ********** ** ******** items), *** *** ***** ***** ***** and ***** ** ********** **** ********* on *** ****** ****.
*** *******, ******** ** ******** ** a ******** *** ********* ********** ** personal *****, ***** ********* ********* ** the ***** **** ******* "****-**********".
** **** *** **** ****** **** to *********** ******** *** ***** ***** rates **** ***** *******, *******, **** believes **** ********* ********* ***** *** most ********* ******* **** *** ******* false ***** ****, ******** *** *** lowest ***** ***** ****, *** ************ walk-through ********* *** ** *** ******.
*** *******, **** ******** ***-**% ***** ***** **** ** * ballet ***** ** *** **** ****** * *** *** (*.*. * 10-15% ***** ***** ******* *******, ********, and *********).
Few ****** *** ******* ******* ***** ******
***** *** *** ****** **** ******** show ****** ***** ******* **** *******, but *** ********* **** **** ****** going ******* *** ******** ******* ******** despite *** ******** **** ***** ***** rate:
***** *** ***** ********* ****** ***** in *** ***** *****:
(*) *** ******** ***** ** *** video ** ****** * *****
(*) ******** *********** ******* *********, *** umbrellas - ******* **** ****** ****** in **** ******* ** ************ ***** detectors (******* ******* ******* *********** **-** **** ****), *** **** *** ****** **** stopped.
(*) *** ******* ** **** *********** caused ** *** ***** ** *****, which ** ** ********* ** ** alarm, ********* ** *********'* ******, *** **** **** *** ******* (i.e. ******** ****** **** *** ********* by *** ******)
**** ****** ******** ***** *** ************* of **** ********* *** ***********' ***** sense ** ********, *******, ** ** not ***** ******* *** ********* ** the **** ** ***** ** *** video ** ********* *********.
Is ******* ***** ********* *********? *** *** **
***** ***** ** ******** ********** **** "knife ******/*********" ****** ** *** ****** of *********** ******** ****** *** *** confiscation ** ***** *******, ***** ** "limited ********" **** ***** ******* **** to "********** ** ***** ***** *** associated *****", ********* ** ******* ***** ***** ******* ******* ************ ** ******* ** ********.
***** ** ****** ** * ****** illegally ******** * ***** **** *** detected ** *** **** ** ** obvious ******** *******, * ********* ****** was **** *********** ** **** ** a ******** ** **** ********* ** a ******** ********.
** *** ***** ****, *** ********* aspect ** **** ********* ****** *** number ** *********** ****** ** ****** carrying ****** ***** ***** **** ** home ****** *** ***** ********* ******.
Operation *******: **********
********* *******, ***** ************ ******** ** ****** ** ****, ** * ********** ********* ******** knife ***** **** *** ********* **********:
- "**** *** ******" (*.*. ******** *** searching ***********)
- ***** ******** (*.*. ******** *** ******* on *** *******)
- ***** **** *********
- ***** ******* **** (******* **** *** bins ***** * ****** *** ******* of *** ***** **** "** ********* asked")
- ***** *********
- ***.
******* ** ***** ********* ** ** intensification ** ****** ********, *** *******, National ****** ***** ********** *** ***** ******* ** *** operation****:
********* *******, ** ********** ** ****** knife *****, ******* ********* ****** ** November. *** ** ****** *** *** British ********* ****** **** **** **** inintensified ******* ** ***** **** ** *****-******* ***** *** ******** [emphasis added]
********** *** **** ** ******, ****** will ********** ******** ******* ** ****** the **** ****** ** ***** *****.There **** ** ***** ** *** ********* ******* ** *********, **********, ********** *** ***********, all of which are important in playing our part to reduce knife crime. [emphasis added]
*** ********* ***** * **** *** takes ***** ******** ***** *** **** - ** **** ********* **** ***** in *** *** ********.
Knife ******** ** *** **: **********
*** ** ** ********* *** *** knife ********, **** **** ******,*** ******** ********* * ***** ************ *** **** ****** ***** **** in ******* *** ***** - * 9% ******** ******** ** ****/**** *** a **% ******** ******** ** * decade *** (****/****), ********* ** ***** of ****** **********:
*** ** ***** **,*** ********, ***** are *** ********* ***** ** * ~11% ******** ******** ** *** ******** year.
******** ** ***** ***** ** *** US ** **** (*** ****** **** with **** ********* *** **** *********), England *** ***** **** ~* "***** instrument" ********* ******** ** ~* "*****/******* instrument" ********* *** *,***,*** ** *** US (********* ***** ********* ****** ** ******** ********** ****). *** *********, ***** **** ~** handguns *** ******** ********* *** *,***,*** in *** ** ** ****.
* *********** **** ** *** ****** concern **** ***** ******** ** *** age ** ********* *** *** *******, as **** ** **** *** ***** people:
- ** ******* **** ** ** ** years **** ****** ** * ***** or ***** ********** - ~**% ** all *** *****/***** ********** ******
- ********* (**** **-**) **** *** ********* in **% ** ***** ********** *****
***** *** *** ******* ***** ***** being **** ************* ** ****** ****** or ******* ******, *******, ***** ** a ***** ******* ** ********* ********* knives **** ******** ***** * ******* choice. *** *******, *** ******* ***** shows****/**** ****** ***** ****** ****(*** **** ** **** ****** ***** how ***** * ********** **** ** knife ******** ** ******; *** ***** of *** **** ********** *** ******* represents *** ********** *** ***** ** weapons **** **** ** *** **** incident, ******* ********** ***** ********):