The police are said to have found the man by chance and he was arrested on Thursday in Hjulsta in northern Stockholm.
-He was arrested in Hjulsta tonight in the company of other people.
He is suspected of further criminal suspicions that we are now taking action on, says Stephan Kiernan, head of the reconnaissance section in Stockholm North, to Expressen.
He is convicted of a murder that was committed in January 2018, when he was 16 years old.
A man was then murdered at a pizzeria in Rinkeby in northwest Stockholm.
It was in July last year that the man was released during a guarded leave.
In October last year, three young men were convicted in the district court for grossly promoting flight.
Two of them were sentenced to five months in prison while the third was sentenced to juvenile detention.