Author's accepted version (post-print).This is a pre-copyedited, author-produced version of an article accepted for publication in Policing: A journal og Policy and Practice following peer review. The version of record Filstad, C., Karp, T. & Glomseth, R. (2018). How police leaders learn to lead. Policing: A Journal of Policy and Practice is available online at: https://doi.org/10.1093/police/pay043.Available from 07/07/2020.