Macao pro-democracy former lawmaker Au Kam San was sentenced to 12 1/2 years in prison Friday in the Chinese casino hub's first national security case following a closed-door trial that raised concerns about fairness.

Au's arrest last year was the first publicly known prosecution under Macao's national security law since it was enacted in 2009.

A Macao court found him guilty of subverting state power, breaching confidentiality and establishing contact with organizations, groups or people outside Macao to commit acts endangering national security.