Since 2009, I have been teaching criminal law, which in principle is about punishing the person who has committed criminal offence covered by the Criminal Code, but exceptionally, measures can now also be applied against legal persons as well. I have published 4 textbooks on criminal law and more than 100 articles on the various aspects of the field, and obtained my PhD in 2012 on the subject of concurrence of offences.

I have been teaching the law of regulatory offences as an independent course since 2016, and in 2022 I published a textbook on the subject. Since 2012, the law of regulatory offences has been essentially a "minor criminal law", i.e. it allows for the sanctioning of behaviour that is less dangerous to society. The distinction between regulatory and criminal offence raises a number of theoretical and practical problems, which I have addressed in several articles.

I have been researching criminal law issues related to the COVID-19 pandemic since March 2020, I have published several papers in English and Hungarian, organised conferences and participated in research projects on the topic. The pandemic has also prompted the examination of a number of existing but rarely used criminal offences, such as the fearmongering. It was also necessary to examine the criminal law issues of the deliberate spread of the virus and the changes of crime statistics.

In my monograph published in 2019, in a series of commentaries edited by me, and in several articles in English and Hungarian, I have been researching the topic of compliance. Compliance initially appeared in the large corporate sector, but according to the new European Union regulations, it is now being applied to smaller firms and the public sector too. The aim of compliance to follow legal and ethical rules and the prevention of potential corporate wrongdoings, the main tools are whistleblowing and (internal or external) investigation.

The topic of my habilitation thesis is digitalisation and criminal law, in the context of which I mainly analyse the impact of new innovations of the 21st century (e.g. artificial intelligence) on criminal law.