In this report, we analyzed the trends of crimes nationwide by type and changes in crimes before and after the COVID-19 outbreak. The crimes targeted for analysis are murder, robbery, violence, theft, domestic violence, sexual violence, dating violence, fraud, traffic accident, and suicide. In addition, the police's activities in response to Corona 19 were summarized and the opinions of the on-site police officers were presented.

In the case of murder crimes, the absolute value of the number of daily occurrences was so small that it was difficult to find characteristics related to the distribution of COVID-19 outbreaks. For this reason, it was difficult to infer the change of trend and its factors, as well as the overall distribution of occurrences in analyzing homicide crimes by region.

It was found that robbery crimes occurred less in 2020 than in the last two years, especially during the first and second surges. However, as robbery crimes are continuously decreasing, it was difficult to be sure that these changes were the effect of COVID-19.

Theft crimes have shown a somewhat increasing trend over the past three years. However, in 2020, until early February, before the outbreak of the COVID-19, it continued an increasing trend. But after the outbreak of the corona, the increasing trend stopped and decreased. Theft crimes showed a slight decline, especially during the first and second spikes.

Sexual violence has increased during the last three years from winter to summer and then decreased again. In 2020, it has not deviated significantly from this periodicity. There was a difference in the number of sexual violence crimes immediately after the first rapid increase and after the second rapid increase.

Violent crime showed a weak periodicity gradually increasing until August-September and then decreasing again, showing a trend of increasing and decreasing over the past three years. In 2020, this periodicity weakened and showed a general decline. In particular, violent crimes occurred most in September over the past two years, but in August-September of 2020, which coincides with the second surge, the incidence of violent crimes was the lowest compared to other years.

Domestic violence incidents have shown a gradual decline over the past three years, and it seems to continue this trend in 2020. Domestic violence increased significantly during the second stage of social distancing and was found to have occurred more than usual. In other words, domestic violence decreased during the second pandemic during the second pandemic due to the reinforced social blockade, but increased during the mitigating period.

Dating violence has been on the rise over the past three years. Dating violence shows a somewhat increased periodicity in summer compared to other seasons. In 2020, this periodicity is maintained and does not differ significantly from the outbreaks in the past two years.

Frauds have been showing a steadily increasing trend over the past two years, but in 2020 they have decreased slightly. The overall decline of fraud in 2020 can be interpreted as decreasing the chances of fraud as social interactions decline.

The number of traffic accidents showed a periodicity that gradually decreased as winter approached and gradually increased as it approached summer. A characteristic feature of the outbreak of traffic accidents in 2020 is that the number of occurrences was significantly reduced during the first rapid increase in COVID-19 and then recovered again after June.

Suicide in 2020 decreased compared to previous years during the 3rd stage of social distancing, when the degree of social blockade was the greatest, and then increased significantly, causing more suicide incidents than in previous years during the 2nd pandemic and the 2nd stage of social distancing.

With the outbreak of COVID-19, on-site police officers were able to confirm that they were suffering various difficulties as they performed completely new duties due to COVID-19 in addition to the missions that had been regarded as traditional police duties.

The on-site police were in a situation where they had to provide a lot of resources for role investigation, and they also supported the management of quarantines and social distancing. Here, the police's human resources and information network were utilized. In addition, if people do not comply with the demands of the quarantine authorities or do not comply with administrative orders, they have also played a role in judicial treatment according to individual laws such as infectious disease violations. In addition, new tasks were carried out due to COVID-19, such as cracking down on selling masks and fraudulent sales, and cracking down on the spread of false facts that aggravate public anxiety.

As collaboration between the police and local governments increased due to COVID-19, the work at the site level became somewhat confusing, and the demands for the police of the competent departments increased, increasing the burden on the work of the on-site police.

In order for the police to adequately cope with such an outbreak of infectious diseases, the police, such as preparing internal guidelines for the input of appropriate police resources, and preparing individual authorization clauses under the Police Officer's Job Execution Act to induce the coercion of the relevant administrative police and the prevention of COVID-19. Laws and institutional regulations on the use of resources should be prepared. In addition, an ICT response system based on big data is required as the criminal environment changes, and regulations and R&D systems to support this will be needed.