I was just researching Mathias Rust since he was mentioned in the Cessna 172 article[0] trending on HN right now.
Wikipedia says he stabbed a nurse shortly after his return, but was lacking details. A quick search turned up a couple news articles.[1][2] Notable excerpts include:
"According to police, Rust pulled an 18-year-old student nurse into a hospital changing room and, after locking the door behind them, attempted to kiss her.
When she resisted, she was stabbed twice in the stomach, police said."
He received only two and a half years in prison for that. The woman he stabbed nearly died. What the fuck.
"Mr. Rust had testified that he might have been drugged throughout his captivity in the Soviet Union, where he had been jailed for more than a year after landing a borrowed plane in Red Square in May 1987."
Having just read an article on the U.S.'s psychochemical warfare program[3] in the 1950s and 60s, and considering the Soviets had similar programs, I suppose it's possible he was drugged in a manner that had long-term effects. It'd make sense for the Soviets to render him violent in an attempt to destroy what amounted to a Western folk hero at the time.
That said, he was already out of his mind to attempt penetrating Soviet airspace in a Cessna 172, so an incident involving spontaneous violence isn't exactly surprising.
Either way, I found the whole thing extremely bizarre.
[0] https://news.ycombinator.com/item?id=13792309
[1] http://articles.latimes.com/1989-11-24/news/mn-176_1_moscow-...
[2] http://www.nytimes.com/1991/04/20/world/red-square-pilot-con...
[3] http://www.newyorker.com/magazine/2012/12/17/operation-delir...