I read an interesting article today over at brainblogger about a Swedish med student who was admitted to medical school even though he had been convicted of murder. Apparently the school is legally restricted from performing criminal background checks.
The article brings up an interesting point about research associating professionalism during residency with professionalism as a practicing physician. The research indicates that unprofessional residents end up as unprofessional doctors. While this may seem unsurprising to most people, it seems to have gone right over the heads of the admissions committee.
It would seem the medical school could have picked up on some of the "character flaws" if they had done some fairly simple behavioral testing.