John Musetescu Werberg is serving a 95-year sentence for three murders in Barcelona. He has been sentenced to one year in prison and to pay a fine of 2,930 euros for attacking five prison officials.
The attack occurred while he was in preventive detention awaiting trial in Brians 2 (Sant Esteve Sesrovires) He was involved in various violent incidents while refusing to receive his family, who traveled on several occasions from Uppsala (Sweden) to meet him.