Source:
https://scmp.com/article/49438/prison-mixPrison mix-up
NEUMUNSTER, Germany: Mathias Rust, the German pilot who stunned the world by buzzing the Kremlin and landing in Red Square in 1989 and who was jailed last year for 21/2 years for stabbing a nurse who rejected his amorous advances, voluntarily returned to prison after he was mistakenly freed.