Русско-англо-русский юридический словарь

Treason is criminal disloyalty. Historically, in common law countries, high treason is treason against the state. It was differentiated from petty treason (or petit treason), which was treason against a lesser lawful superior (such as a servant killing his master). (Wikipedia)

The London boss of Russian airline Aeroflot has been arrested on suspicion of high treason after allegedly handing over state secrets to British intelligence. (Daily Mail)

Having served 27 years on charges of “treason against the state” in the notorious Robben Island and other jails, the man yet to become South African president, was already entering old age at 71. (Independent)