Madsen begins serving his life sentence in a Danish prison. Life imprisonment in Denmark typically translates to around 16 years, but can be extended indefinitely if the prisoner is deemed to remain a danger to society.

Peter Madsen attempts to escape from Herstedvester Prison. He is quickly apprehended by authorities. The circumstances surrounding the escape attempt are widely reported in the media, further tarnishing his image.

Madsen remains incarcerated, with limited information available regarding his day-to-day life in prison. He has consistently maintained his innocence regarding the intentional murder of Kim Wall.