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Review of IOPC cases involving the use of Taser 2015-2020

August 2021

Our aim in publishing this report is to contribute to the growing evidence base around Taser use, help develop a deeper understanding of the perceptions of community groups and stakeholders about Taser, and improve public confidence in policing through accountability, engagement and transparency.

Tasers are recognised internationally as useful police tools and can be effective in diffusing dangerous situations. However, some community groups and stakeholders have told us of growing concerns, particularly about the disproportionate use of Taser against Black men, people with mental health concerns and its use on children.

Some national organisations, academics and community members have concerns that Taser may be used as a default choice where other tactical options could be more effective.

Through our engagement with stakeholders and community groups, it is clear there is some divergence between community expectations about when a Taser should be used, and the situations in which Taser can be used legitimately under current national guidance. This was also identified by our predecessor organisation¹.

In May 2020, we called for greater scrutiny, transparency, and robust oversight of Taser use by national and local leaders to provide public reassurance and instil confidence².

This report brings together an evidence base informed by:

Of the 101 independent investigations we reviewed: 108 people were subjected to Taser use. 94 people had a Taser discharged against them.

Type of Taser use

Home Office data³ shows that the number of times Taser was used has increased, with Tasers being used in around 32,000 incidents in 2019/20. This increase may reflect an improvement in police recording practices. It may also reflect the increase of Taser-trained officers and Tasers available in police forces (based on forces’ strategic assessments of threat and risk), or officers dealing with more incidents that have the potential for conflict.

Taser was used in 5% of all use of force incidents in 2017/18 and 2018/19, and 7% of incidents in 2019/20. Taser was used far less often than ground restraint and unarmed skills⁴ but is used in more incidents than all other types of equipment, including irritant spray and batons.

Home Office data shows that in most incidents where Taser is used, it is not discharged, with fewer than 12% of incidents involving Taser discharges. In contrast, the majority of cases we investigated involved a Taser being discharged. This is a reflection of the fact that we investigate the most serious and sensitive cases.

Use of Taser in potentially unsafe locations

Fourteen of the cases we reviewed involved the use of Taser in potentially unsafe locations or circumstances. In these cases, we found evidence that officers had not considered adequately the risk of injury to individuals, based on the environment and the individuals’ vulnerabilities, as part of their ongoing risk assessment.

Multiple and prolonged discharges

Of the 101 cases we reviewed, just under a third of people who had a Taser discharged on them were subjected to prolonged discharges. There were eight incidents where a Taser was discharged continuously for more than 20 seconds. Mental health or acute behavioural disturbance⁵ were common features in cases where Taser was discharged for 20 seconds or longer. Incidents involving prolonged discharges also commonly involved multiple discharges, and in seven incidents, there were multiple prolonged Taser discharges.

Of the 94 people against whom a Taser was discharged, over half were tasered more than once. Some cases involved multiple discharges because the Taser missed, did not effectively connect with the individual, or did not successfully incapacitate them. The number of discharges does not therefore correspond to the number of times the individual actually experienced the effects of Taser.

Taser use for compliance

College of Policing (CoP) national guidance states that “Taser should never be used for procedural compliance”. We identified potential issues with Taser being used for compliance in almost a quarter of the cases we reviewed. We found in some cases that officers failed to identify, and as a result failed to consider, how a person’s vulnerabilities might affect their ability to understand and comply with instructions.

Use of Taser in custody or medical settings

Despite the relatively small number of cases we reviewed involving the use of Taser in custody or medical settings, we remain concerned about these incidents. Home Office data shows that there were hundreds of Taser uses in these settings in 2019/20, including over 100 discharges.

Use of Taser in drive-stun mode

The IPCC’s 2014 review of Taser highlighted that Taser was being used in drive-stun mode, despite the fact it was no longer taught in training because it is ineffective at achieving neuromuscular incapacitation. While statistics show a significant reduction in the use of Taser in drive-stun mode⁶, several of the cases we reviewed involved the use of Taser in this way.


Although 16 of the 101 cases we reviewed involved a death, it is important to emphasise that these deaths were not necessarily the result of Taser use. However, four inquests have found that the use of Taser, in combination with other factors, contributed to or were relevant in a person’s death.

Family members of those who died told us they are particularly concerned that officers lack an understanding of the risks of Taser use. They want more research to be conducted to understand the risks associated with Taser, which can then be used to inform guidance and training.


Six children were involved in the cases we reviewed⁷. Home Office data for 2019/20 shows that around 2,800 Taser incidents involved children, 134 of which were Taser discharges. This raises questions about whether forces are considering appropriately the requirement to voluntarily refer incidents of Taser use against children to the IOPC.

The IPCC’s 2014 report⁸ highlighted concerns about the use of Taser on young people. These concerns remain, with stakeholders increasingly concerned about the limited research around both the physical and psychological risks of Taser use on children.

Mental health, drugs, and alcohol

Home Office data shows that officers did not report people having either a physical disability or mental health concerns in around 80% of Taser incidents. However, other evidence suggests that mental health is a more common feature in Taser incidents than the Home Office data suggests. For example, the IPCC’s 2014 report on Taser and the 2016 report on Use of Force⁹, found that mental health was a significant factor in the referrals we received and in the investigations we reviewed. The CoP’s analysis of 2017/18 use of force data¹⁰ found that a person having mental health concerns increased the odds of Tasers being both drawn and discharged.

Mental health was a common feature in our investigations. In incidents where mental health was a factor, people were more likely to be subjected to multiple and prolonged discharges than the overall sample. Drugs and/or alcohol was a factor in just over half of the cases we reviewed. Many of the people who had links to drugs and/or alcohol also had mental health concerns. Acute behavioural disturbance featured in a number of our investigations. In many of these cases, drugs and/or alcohol was also a factor.

We found examples of good practice where officers recognised signs that an individual may have been experiencing acute behavioural disturbance and responded in line with policy and guidance. We also found examples where officers failed to recognise the signs and did not respond in accordance with guidance.

Some stakeholders and community groups have expressed concerns that police officers do not always have the skills required to communicate effectively with people who have mental health concerns or learning disabilities, and that this increases the likelihood of officers using force.

People reported to be violent, aggressive or resisting and in possession of weapons

The CoP’s analysis of use of force data¹¹ found that the factor with the strongest association with a Taser being discharged was the officer reporting that they faced active or aggressive resistance from the individual. This is in keeping with the IPCC’s 2016 report on use of force, which found that Taser was often used following reports of violent behaviour. The IPCC’s 2014 report on Taser use and 2016 report on use of force also found that the possession of weapons was a common feature in the Taser cases reviewed.

Of the cases we reviewed, 108 people¹² were subjected to Taser use over the five- year period. The vast majority of people (90 of 108), were described or reported by officers as being aggressive, violent or resistant. Just over a third were in possession of a weapon at the time of the incident. We found that mental health or acute behavioural disturbance was a factor in 80% of incidents in which a person was in possession of a weapon.


We welcome the introduction of the CoP’s new conflict management guidelines and the proposed training to support it. We found examples of good practice by officers who utilised effective communication and de-escalation skills. However, in just under a third of the cases we reviewed, we identified potential missed opportunities for officers to de-escalate situations. This meant that during an incident there were chances for officers to use communication and negotiation skills to defuse a situation rather than having to resort to force.

In a third of our cases, officers made inappropriate comments or communicated inappropriately during the incident. Some comments were of a derogatory nature.

Disproportionality and discrimination

With rates similar to Home Office ethnicity data on Taser use, Black people were disproportionately involved in our Taser investigations¹³. Asian people were slightly under-represented in our cases.

In the cases we reviewed, Black people were, as a proportion, less likely to have been subjected to a Taser discharge than White people but were more likely to be involved in cases where the Taser was aimed or red dotted. This is contrary to Home Office data which shows that while Black people are more likely to be involved in Taser uses overall, there is little difference between the likelihood of Black people and White people being subjected to a Taser discharge.

In the cases we reviewed, when Black people were subject to Taser discharges, they were more likely to be tasered for prolonged periods. Twenty-nine per cent (29%) of White people involved in Taser discharges were subjected to continuous discharges of more than five seconds, whereas the figure was 60% for Black people.

In the majority of cases involving either allegations of discrimination or common stereotypes and assumptions, there was evidence that the individual concerned had mental health concerns or a learning disability. This supports findings by others that the intersectionality of race and mental health can increase the risk of higher levels of use of force.

Concerns about race discrimination and disproportionality is one of the most common issues raised by community groups and stakeholders in relation to Taser use. There is particular concern that the stereotyping of young Black men and boys is leading to them being disproportionately subjected to police use of force, including Taser. Black communities we engaged with want their concerns to be heard and acted upon. They believe that individual incidents involving the use of Taser cannot be viewed in isolation, but in the wider context of long-standing tensions between the police and the Black community.

We welcome the fact that the CoP and National Police Chiefs’ Council (NPCC) have commissioned research to consider disproportionality in Taser use. Our findings suggest that this is an opportunity for the issues we have outlined above to be considered. It is imperative that this research is robust and that the findings from it are published and used to inform national policy, training, guidance and practice. The actions identified must be monitored, their impact evaluated and reported upon.

Community groups have raised concerns with us about the disproportionate policing of their communities compared with other racial groups and the impact of racial bias that influences the beliefs, actions and decisions of officers.

Stakeholders and community groups want access to better national data on the use of Taser, that is disaggregated to better enable community scrutiny. They also want more opportunities to review and discuss incidents that have caused them concern, so that opportunities for learning can be identified and acted upon.

¹ IPCC (2014). IPCC review of Taser complaints and incidents 2004-2013. Retrieved from learning/use_of_force_review_of_taser_complaints_and_incidents.pdf

² IOPC news release (14 May 2020) IOPC calls for greater scrutiny of Taser use following increasing concerns. Retrieved from use-following-increasing-concerns

³ Home Office. Police use of force statistics. Retrieved from

⁴ This includes distraction strikes with hands and feet; and pressure point and joint locks.

⁵ Acute Behavioural Disturbance is a term used to describe symptoms that can be caused by a number of conditions. It is also sometimes referred to as ‘excited delirium’. These conditions are associated with extreme mental and psychological excitement, which can be characterised by extreme agitation, hostility, exceptional strength and endurance without fatigue.

⁶ In 2019/20 drive stun was used 41 times. In the same year, Tasers were used in 32,000 incidents.

⁷ In this review, the term ‘children’ is defined as those under 18 years-old.

⁸ IPCC (2014). IPCC review of Taser complaints and incidents 2004-2013. Retrieved from learning/use_of_force_review_of_taser_complaints_and_incidents.pdf

⁹ IPCC (2016). Use of force report. Retrieved from learning/IPCC_Use_Of_Force_Report.pdf

¹⁰ College of Policing (2020). Police use of force: Tactics, assaults and safety. Retrieved from

¹¹ College of Policing (2020). Police use of force: Tactics, assaults and safety. Retrieved from

¹² Three of the 101 cases we reviewed involved the use of Taser on more than one person.

¹³ Twenty-two (22%) of the individuals involved in our independent investigations were Black, despite Black people making up less than four per cent (4%) of the population.

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