
Criminal Offence Solicitors: Tracking Violent Offenders
Tracking Violent Offenders: How GPS Monitoring Is Being Used in Criminal Cases
A pilot is being carried out into electronic monitoring global positioning system (GPS). The aim of the pilot is to gain information to look at how existing and new electronic monitoring technologies could be used more effectively, particular for violent offenders. A specific pilot is also taking place in London for offenders who have served a custodial sentence for knife crimes.
As criminal offence solicitors, in the blog, we take a look at what time pilot entails.
What is the Pilot for Knife Crime
The pilot began in February 2019 and was expanded from 4 to 24 boroughs of London. Up to 300 offenders could be tagged in the 12-month pilot. The pilot was due to end April 2020.
Eligible offenders are those who are released from prison following sentencing for offences such as possession of a knife, robbery, aggravated burglary and grievous bodily harm. The offender must be over 18 and released from a London prison to suitable accommodation in a pilot area. The tagging is used as part of strict licence conditions.
What is the Status of the Pilot in 2025?>
Between 2019 and November 2022, 971 GPS tags were imposed on 881 individuals as part of the knife crime tagging pilot. The majority were used on offenders released from prison, with almost all tags set to track location trails.
Initial findings show strong compliance and a positive impact on crime mapping, with early signs of a potential deterrent effect. While the evaluation didn’t assess reoffending rates, partner agencies welcomed the scheme.
As a result, GPS tagging for knife crime offenders is now set to continue until March 2026, expanding its role in managing and monitoring high-risk individuals.
Hasn’t the Tag Been Around for Ages?
The tag that is commonly referred to is a tag to monitor a curfew. A curfew is monitored through radio frequency technology and does not track location. Such a tag is frequently used as part of bail conditions and on release from prison sentences. It can be used for almost all offenders, not just violent offenders.
What is the Difference Between the Newer Tags vs the Older Ones?
A global positioning system (GPS) tag is a location monitoring enabled tag. A person’s location is captured 24 hours a day. It can also be used to monitor a specific area such as an exclusion zone where active monitoring only takes place if there is a breach of that condition.
How Does it Work?
A tag around the ankle is worn 24 hours a day, and a satellite signal can pinpoint the wearer’s location. They are designed to be difficult to remove. However, if it is removed, an alert is generated to a monitoring centre.
The location monitoring is carried out in live time. The alerts in the event of a breach are immediate so that appropriate action can be carried out. As a result, high-risk offenders can be prioritised for an emergency response.
How is the Information Used?
An offender’s movements will be checked against the location of reported crimes or areas he is not permitted to be in as part of the licence conditions. It was also be used statistically to improve crime detention, monitor attendance at locations such as drug testing and rehabilitation activities and to enforce restrictions such as exclusion zones.
As well as being able to check that a person is where they should, or shouldn’t, be, monitoring can be used to assess behaviours and routines. An offender’s probation officer can use the information to see how that person is spending their time and how this impacts on their behaviour or possibility of further offending. The Probation Service can be provided with daily “heat maps” of addresses visited by the offender. This can be used to challenge their lifestyle choices.
Previous Issues with Electronic Tags
In 2019, Serco was fined nearly £23 million by the Serious Fraud Office under a deferred prosecution agreement for offences of fraud and false accounting. The company had understated the level of profitability of its electronic monitoring contract in reports to the Ministry of Justice. The investigation began in 2013 when Serco paid £70 million in compensation to the government and lost their contract. Serco and G4S faced allegations of charging the government for electronically monitoring people who were dead, in jail or out of the country.
Need Legal Advice From Criminal Offence Solicitors?
If you need specialist advice in relation to any criminal investigation or prosecution, from the initial investigation through to court proceedings, our criminal offence solicitors can help. We provide expert support from the earliest stages of investigation through to court proceedings and beyond.
Contact us today for expert help.
Please note that the information contained in this article was correct at the time of writing. There may have been updates to the law since the article was written, which may affect the information and advice given therein.






