Handguns are by far the most common murder weapon used in the United States, accounting for 7,159 homicides in 2023. This is followed by firearms of an unstated type, with 5,295 cases in that year. Why do murders happen in the U.S.? While most of the time the circumstances of murders in the U.S. remain unknown, homicides due to narcotics come in as the second most common circumstance – making them more common than, for example, gang killings. Despite these gruesome facts, the violent crime rate has fallen significantly since 1990, and the United States is much safer than it was in the 1980s and 1990s. Knife crime vs disease: Leading causes of death The death rate in the U.S. had hovered around the same level since 1990 until there was a large increase due to the COVID-19 pandemic in recent years. Heart disease, cancer, and accidents were the three leading causes of death in the country in 2022. The rate of death from heart disease is significantly higher than the homicide rate in the United States, at 167.2 deaths per 100,000 population compared to a 5.7 homicides per 100,000. Given just 1,562 murders were caused by knife crime, it is fair to say that heart disease is a far bigger killer in the U.S.

Through the past 10 years, a knife or another stab weapon was the most common murder weapon used in homicides in Norway. In 2023, in 16 of the 35 homicides registered, a knife or another stab weapon was the murder weapon. 11 people were murdered by firearms the same year, the highest during the period under consideration.

In 2023/24 there were 262 homicides involving a knife or other sharp instrument in England and Wales, compared with 243 in the previous reporting year. During the provided time period, knife homicides have fluctuated from a low of 186 in 2014/15 to the high seen in the 2017/18 reporting year.

Number of homicide victims, by method used to commit the homicide (total methods used; shooting; stabbing; beating; strangulation; fire (burns or suffocation); other methods used; methods used unknown), Canada, 1974 to 2023.

Since 2012, a knife or another stab weapon was the most common murder weapons used in homicides in Norway. In 2024, in 19 of the 41 homicides registered, a knife or another stab weapon was the murder weapon. By comparison, the number of people murdered by firearms was lower.

Here are a few use cases for this project:

1. Surveillance Systems: The "Stabbing_Knife_Deploy" model could be used in smart surveillance systems to identify potential dangerous behavior within a scene, such as a person deploying a knife. Early detection can alert authorities and prevent potential crime incidents.

2. Video Content Monitoring: This model can also be used for monitoring video content on online platforms, to automatically detect and flag violent content or scenes involving assault with knives for review or removal.

3. Personal Security Apps: Personal safety apps could integrate this model to alert the user whenever a knife is deployed around them, especially in unsafe areas or during nighttime.

4. Forensic Investigations: Within the context of crime scene analysis or forensic investigations, the model can help in going through security footages, and provide precise timestamps or identify key frames involving the act of stabbing.

5. Training Simulations: The model could be used within simulated environments for training law enforcement officers or security personnel to identify stabbing incidents and react appropriately.

The number of knife or sharp instrument offences recorded by the police in London rose to approximately 15,016 in 2023/24, compared with 12,786 in the previous year. This was the highest number of knife crime offences reported in London since 2019/20, when there were 15,928 offences. Between 2015/16 and 2019/20, knife crime in London increased yearly, with a particularly large increase occurring between 2016/16 and 2017/18. A wider trend The increase in knife crime witnessed in London has occurred alongside a general increase in overall crime throughout England and Wales. In 2022/23, there were approximately 6.74 million crime offences across England and Wales, compared with just over four million ten years earlier. During a similar time period, the number of knife homicides also increased, and reached 282 in 2021/22, compared with 186 in 2014/15. Due to strict gun laws in the United Kingdom, firearms are rarely used to commit homicides, with knives or other sharp instruments being used in over 41.4 percent of homicides in 2022/23. Acid and moped attacks While knife crime in London has certainly been given a lot of attention by the British media, the increase in acid and moped attacks during the same time period also generated many headlines. In 2017, for example, there were 471 acid attacks recorded by the Metropolitan Police, compared with just 51 in 2007. Moped crime also reached high levels in 2017, with both types of crime declining to much lower levels by the early 2020s. Although overall crime in London continued to rise until 2019/20, this fell back during the COVID-19 pandemic, but by 2023/24, the number of crimes committed in the capital had exceeded pre-pandemic levels.

In 2023/24 there were 116 homicide offences recorded in London, the most of any region of the United Kingdom during that time period. North West England, which includes the large city of Manchester had 71 homicides, and had the second-highest number of homicides. In the same reporting period, the constituent countries of Northern Ireland and Wales reported the fewest homicides, at 24 each. Homicides in the UK falling despite recent uptick Since 2002/03, all three jurisdictions of the UK; England and Wales, Scotland, and Northern Ireland, have seen their homicide rates fall, with Scotland seeing the steepest decline. The most significant decline in homicides in this period occurred between 2002/03 and 2014/15, which saw the annual number of homicides in England and Wales half from over 1,000 to 500. This trend was suddenly reversed from 2015/16 onwards, with homicides rising to around 700 per year between 2016/17 and 2019/20. While homicides fell back to 583 in 2023/24, it remains to be seen if this pattern will continue. Knives used in almost half of all murders In 2022/23 a knife or other sharp instrument was used in over 41 percent of all murders in England and Wales, making this, by far, the most common method of killing in that reporting year. The overall number of knife homicides reached 244 in 2022/23, compared with 282 in the previous year, and just above the 281 reported in 2017/18. Firearm homicides were much rarer than knife homicides, with 29 taking place in the same reporting year, and homicides caused by shooting only accounting for 4.9 percent of homicides overall.

Firearms, knife- and sharp-instrument offences, offences involving a corrosive substance, hospital admissions for assault with sharp objects, fraud, offences flagged as domestic abuse-related, corruption, anti-social behaviour, perceptions, and non-notifiable incidents.

Distribution of previous offences and victimisations (offender-victim).

Knives or other sharp objects were involved in 46 percent of homicides in England and Wales in 2023/24, the most of any method of killing. Homicides which involved hitting or kicking without a weapon made up 17.4 percent of homicides, while shootings were identified as the method in 3.9 percent of homicides. Overall, there were 570 homicides in this reporting year, which was slightly lower than in the previous year, when there were 585, but noticeably higher than in 2014/15, when there were 504. Firearm homicides rare in England and Wales In 2023/24, there were 262 knife homicides in England and Wales, compared with 282 in 2021/22, which was the highest figure recently. By comparison, homicides which involved the use of a firearm were far less common, with just 22 in the 2023/24 reporting year. Due to strict gun laws and low levels of ownership, the UK contrasts starkly with the United States, which has struggled with high levels of gun violence. Although some specialist police officers in England and Wales are licensed to carry firearms, the majority of police officers are unarmed. In 2023/24, for example, there were just 5,861 armed police, out of around 147,746 police officers. Overall knife crime on the rise Like many other types of crime, knife crime offences in the 2010s started to decline at the start of the decade before creeping up again from 2014 onwards, reaching almost 52,000 in 2019/20. In London, where much of the media’s attention on knife crime is focused, there were 15,928 knife crime offences alone in 2019/20. Although this fell during subsequent reporting years, which were influenced by COVID-19 restrictions, it remains to be seen if the trend will continue. In 2023/24, the number of knife offences in the capital was higher than in any other year since 2019/20.

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Number of serious violent offences are recorded by the police and involve the use of a knife or other sharp instrument.

Police recorded crime figures by Police Force Area and Community Safety Partnership areas (which equate in the majority of instances, to local authorities).

Network and descriptive statistics (offender-victim).