[vidarh]

It does not say that 5 of them are in prison by their own choice. It says that 5 of them are in prison.

Further, the article is very confused. It talks about prison (fängelse) some places, and jail other places (häkte) without acknowledging the big difference (häkte would imply someone has been placed under arrest and put in jail pending a trial and sentencing, but most would be let out after the decision of whether or not to press charges have been made, possibly the next morning).

That some may seek to get arrested and put in a jail cell on particularly cold nights (häkte) without worrying about the risk of charges and prison, may be possible, especially for a drug addict who might be making a decision like that in an impaired state.

But it is very different from trying to guess and time a prison sentence.