A convicted killer has been released from prison against his wishes after a judge discovered he should have been freed 20 years ago. Osvaldo Longobuco, 75, told a lawyer who tipped off the authorities he was happy behind bars because he had a roof over his head and guaranteed food. He remained in maximum-security Sierra Chica prison 200 miles south-west of the Argentine capital Buenos Aires despite completing his sentence on October 8, 2001. He could have been released on parole five years earlier but never applied, claiming he had no house to go to. Convicted killer Osvaldo Longobuco, 75, was released from Sierra Chica prison, 200 miles from capital Buenos Aires