The journal Nordic Police Research NPS is entering its fifth year. Since its start in 2014, the journal has received more and more attention and it now contains manuscripts that cover various aspects of police work. The scientific articles have covered a number of areas from, for example, police education studies to street police and police reforms. NPS has over the years become an arena where many scientific disciplines from Nordic and Scandinavian countries meet, to exchange knowledge and experience. This is thanks to researchers who want to drive and develop research in police work. Debate articles and literature reviews have also had a place that has contributed to spreading and increasing knowledge about police science research. On behalf of the editorial board, I would like to thank all the authors and researchers who have contributed to the fact that NPS remains, and over the years has gained a good quality as a scientific journal.

In the current year, NPS, has got a new editorial board consisting of senior researchers from Norway, Finland, Sweden and Denmark. It is therefore time to thank in particular three people who previously have helped NPS contributed to the journal’s recognition. Paul Larsson from the Oslo Police Academy worked as an editor-in-chief earlier and later in the editorial board. His dedication and scientific views in the journal's work have been very valuable. Rolf Granér from the police training at Linné University in Sweden showed great commitment and his solid work in spreading police science research has been exemplary. A third person who should be praised for his involvement in the work of the journal is Lars Holmberg at Copenhagen University, who worked as editor-in-chief for the past two years. His critical approach to police research and his experience in the editorial work was undoubtedly a great force and strength for the journal. Thank you so much for a solid and diligent work with police science research and the journal Nordic Political Research.

New for this year is that NPS has an intention to reach a larger readership. In recent years, the journal has published articles in Scandinavian languages, mainly in Norwegian, Danish and Swedish. The new editorial board has, after careful considerations, decided that there is a value that only scientific contributions written in English will be considered in the journal, from 1 January 2020. Abstract will still be written in both English and any selected Nordic language.

The present issue of NPS publishes articles that concern various aspects of police work. Ghazinour and colleagues emphasize the importance of personality in the work of the police, where stress and various challenges belong to everyday life. Holgersson's article stress whistleblowing in police agencies. The investigation highlight that whistleblowing perceived risk is multifaceted. Antonsson and Ellingsen highlights the importance of “transactional memory” in the collaboration between different actors such as the police, fire brigade and emergency care. In addition to these original articles, we have to thank Tygesen and Heide and Lie for their contributions. Harlev, Tygesen and Skytte have contributed with a debate article, discussing the Danish police’s effectiveness in civil society. They highlight the issue of how effective the Danish police cooperate with the citizens and civil society. Lie has contributed with her review on the book “Criminology and the Police Knowledge – The Meeting between Research and Practice by Peter Lindström and Ulf Sempert, (2018)”. Abby Petterson reviewed and wrote about a report written by Holgersson (2018) about in Swedish: Ursäkta , men vi är faktiskt POLISEN och vi står över lagen !

We also invite a new theme number on the artificial intelligence in the police. Here, researchers from the Nordic countries are invited to send contributions that look at opportunities, interventions and weaknesses of artificial intelligence in the police.

We hope that the readers will find this content valuable in getting increased insight into the latest research questions about the police. Thus, I wish, along with the others in the editorial staff, a much pleasant reading.