Under the current constitution, the CPV is the only party allowed to rule, the operation of all other political parties being outlawed. Other human rights issues concern freedom of association, freedom of speech, and freedom of the press. In 2009, Vietnamese lawyer Lê Công Định was arrested and charged with the capital crime of subversion; several of his associates were also arrested. Amnesty International described him and his arrested associates as prisoners of conscience. Vietnam has also suffered from human trafficking and related issues.